0000936468-19-000022 | 10-Q | XBRL Viewer

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Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2019 shares
Document And Entity Information [Abstract]
Entity Registrant Name	LOCKHEED MARTIN CORP
Trading Symbol	LMT
Entity Central Index Key	0000936468
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	282,538,809

Consolidated Statements of Earnings - USD ($) $ in Millions	3 Months Ended
Consolidated Statements of Earnings - USD ($) $ in Millions	Mar. 31, 2019	Mar. 25, 2018
Total net sales	$ 14,336	$ 11,635
Total cost of sales	(12,148)	(9,977)
Gross profit	2,188	1,658
Other income, net	95	67
Operating profit	2,283	1,725
Interest expense	(171)	(155)
Other non-operating expense, net	(167)	(210)
Earnings before income taxes	1,945	1,360
Income tax expense	(241)	(203)
Net earnings	$ 1,704	$ 1,157
Earnings per common share
Basic (in dollars per share)	$ 6.03	$ 4.05
Diluted (in dollars per share)	5.99	4.02
Cash dividends paid per common share (in dollars per share)	$ 2.20	$ 2.00
Products
Total net sales	$ 11,970	$ 9,762
Total cost of sales	(10,625)	(8,697)
Services
Total net sales	2,366	1,873
Total cost of sales	(2,047)	(1,689)
Other unallocated, net
Total cost of sales	$ 524	$ 409

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Statement of Comprehensive Income [Abstract]
Net earnings	$ 1,704	$ 1,157
Other comprehensive income, net of tax
Recognition of previously deferred postretirement benefit plan amounts	227	300
Other, net	0	58
Other comprehensive income, net of tax	227	358
Comprehensive income	$ 1,931	$ 1,515

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 991	$ 772
Receivables, net	2,833	2,444
Contract assets	10,497	9,472
Inventories	3,285	2,997
Other current assets	425	418
Total current assets	18,031	16,103
Property, plant and equipment, net	6,140	6,124
Goodwill	10,769	10,769
Intangible assets, net	3,425	3,494
Deferred income taxes	3,169	3,208
Other noncurrent assets	6,150	5,178
Total assets	47,684	44,876
Current liabilities
Accounts payable	3,097	2,402
Contract liabilities	6,796	6,491
Salaries, benefits and payroll taxes	1,861	2,122
Current maturities of long-term debt and commercial paper	1,300	1,500
Other current liabilities	2,349	1,883
Total current liabilities	15,403	14,398
Long-term debt, net	12,621	12,604
Accrued pension liabilities	11,418	11,410
Other postretirement benefit liabilities	698	704
Other noncurrent liabilities	5,022	4,311
Total liabilities	45,162	43,427
Stockholders’ equity
Common stock, $1 par value per share	281	281
Additional paid-in capital	0	0
Retained earnings	16,278	15,434
Accumulated other comprehensive loss	(14,094)	(14,321)
Total stockholders’ equity	2,465	1,394
Noncontrolling interests in subsidiary	57	55
Total equity	2,522	1,449
Total liabilities and equity	$ 47,684	$ 44,876

Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 1	$ 1

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Operating activities
Net earnings	$ 1,704	$ 1,157
Adjustments to reconcile net earnings to net cash provided by operating activities
Depreciation and amortization	277	279
Stock-based compensation	37	38
Gain on property sale	(51)	0
Changes in assets and liabilities
Receivables, net	(389)	(108)
Contract assets	(1,025)	(1,413)
Inventories	(288)	(318)
Accounts payable	744	1,290
Contract liabilities	305	(478)
Postretirement benefit plans	278	(1,145)
Income taxes	243	1,064
Other, net	(172)	266
Net cash provided by operating activities	1,663	632
Investing activities
Capital expenditures	(284)	(216)
Other, net	27	130
Net cash used for investing activities	(257)	(86)
Financing activities
Dividends paid	(638)	(586)
Repurchases of common stock	(281)	(300)
Repayments of commercial paper, net	(200)	0
Other, net	(68)	(128)
Net cash used for financing activities	(1,187)	(1,014)
Net change in cash and cash equivalents	219	(468)
Cash and cash equivalents at beginning of period	772	2,861
Cash and cash equivalents at end of period	$ 991	$ 2,393

Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Stockholders’ Equity	Noncontrolling Interests in Subsidiary
Beginning Balance at Dec. 31, 2017	$ (776)	$ 284	$ 0	$ 11,405	$ (12,539)	$ (850)	$ 74
Increase (Decrease) in Stockholders' Equity
Net earnings	1,157			1,157		1,157
Other comprehensive income, net of tax	358				358	358
Repurchases of common stock	(300)	(1)	(25)	(274)		(300)
Dividends declared	(573)			(573)		(573)
Stock-based awards, ESOP activity and other	26	1	25			26
Reclassification of income tax effects from tax reform				2,408	(2,408)
Net decrease in noncontrolling interests in subsidiary	(3)						(3)
Ending Balance at Mar. 25, 2018	(111)	284	0	14,123	(14,589)	(182)	71
Beginning Balance at Dec. 31, 2018	1,449	281	0	15,434	(14,321)	1,394	55
Increase (Decrease) in Stockholders' Equity
Net earnings	1,704			1,704		1,704
Other comprehensive income, net of tax	227				227	227
Repurchases of common stock	(284)	(1)	(46)	(237)		(284)
Dividends declared	(623)			(623)		(623)
Stock-based awards, ESOP activity and other	47	1	46			47
Net increase in noncontrolling interests in subsidiary	2						2
Ending Balance at Mar. 31, 2019	$ 2,522	$ 281	$ 0	$ 16,278	$ (14,094)	$ 2,465	$ 57

BASIS OF PRESENTATION	3 Months Ended
BASIS OF PRESENTATION	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION We prepared these consolidated financial statements in accordance with U.S. generally accepted accounting principles (GAAP) for interim financial information, the instructions to Form 10-Q and Article 10 of U.S. Securities and Exchange Commission (SEC) Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, these consolidated financial statements reflect all adjustments that are of a normal recurring nature necessary for a fair presentation of our results of operations, financial condition, and cash flows for the interim periods presented. The preparation of these consolidated financial statements requires us to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. We base these estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying amounts of assets and liabilities that are not readily apparent from other sources. Our actual results may differ materially from these estimates. Significant estimates inherent in the preparation of our consolidated financial statements include, but are not limited to, accounting for sales and cost recognition, postretirement benefit plans, environmental receivables and liabilities, evaluation of goodwill and other assets for impairment, income taxes including deferred tax assets, fair value measurements and contingencies. The consolidated financial statements include the accounts of subsidiaries we control and variable interest entities if we are the primary beneficiary. We eliminate intercompany balances and transactions in consolidation. We close our books and records on the last Sunday of the calendar quarter, which was on March 31 for the first quarter of 2019 and March 25 for the first quarter of 2018, to align our financial closing with our business processes. The consolidated financial statements and tables of financial information included herein are labeled based on that convention. This practice only affects interim periods as our fiscal year ends on December 31. We adopted Accounting Standards Update (ASU) 2016-02, Leases (Topic 842), effective January 1, 2019, using a modified retrospective transition method. Consequently, periods prior to January 1, 2019 are not restated for the adoption of ASU 2016-02. See “Note 6 – Leases” and “Note 12 – Recent Accounting Pronouncements” for more information regarding our adoption of this standard. Other than the changes in our accounting policies related to adoption of ASU 2016-02, we followed the accounting policies disclosed in the consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2018 (2018 Form 10-K) filed with the SEC. The results of operations for the interim periods presented are not necessarily indicative of results to be expected for the full year or future periods. Unless otherwise noted, we present all per share amounts cited in these consolidated financial statements on a “per diluted share” basis. These consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto included in our 2018 Form 10-K.

EARNINGS PER COMMON SHARE

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

EARNINGS PER COMMON SHARE

The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions):



	Quarters Ended
	March 31, 2019	March 25, 2018
Weighted average common shares outstanding for basic computations	282.5	285.5
Weighted average dilutive effect of equity awards	1.8	2.4
Weighted average common shares outstanding for diluted computations	284.3	287.9

We compute basic and diluted earnings per common share by dividing net earnings by the respective weighted average number of common shares outstanding for the periods presented. Our calculation of diluted earnings per common share also includes the dilutive effects for the assumed vesting of outstanding restricted stock units (RSUs) and performance stock units (PSUs) and exercise of outstanding stock options based on the treasury stock method. There were no significant anti-dilutive equity awards during the quarters ended March 31, 2019 or March 25, 2018.

INFORMATION ON BUSINESS SEGMENTS

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

INFORMATION ON BUSINESS SEGMENTS

We operate in four business segments: Aeronautics, Missiles and Fire Control (MFC), Rotary and Mission Systems (RMS) and Space. We organize our business segments based on the nature of the products and services offered.

Net sales and operating profit of our business segments exclude intersegment sales and cost of sales as these activities are eliminated in consolidation. Business segment operating profit includes our share of earnings or losses from equity method investees as the operating activities of the equity method investees are closely aligned with the operations of our business segments.

Business segment operating profit also includes total pension and other postretirement benefit plan costs recoverable on U.S. Government contracts as determined in accordance with U.S. Government cost accounting standards (CAS). However, our financial statements must present total costs calculated in accordance with Financial Accounting Standards (FAS) under U.S. GAAP. Accordingly, the adjustment from CAS cost to FAS service cost for our postretirement benefit plans is excluded from business segment operating profit (see additional discussion below). Business segment operating profit also excludes expense for stock-based compensation, corporate costs not considered allocable under FAR, and the effects of items not considered part of management’s evaluation of segment operating performance.

Excluded items are included in the reconciling item “Unallocated items” between operating profit from our business segments and our consolidated operating profit. See “Note 11 – Other” for a discussion related to certain factors that may impact the comparability of net sales and operating profit of our business segments. Summary operating results for each of our business segments were as follows (in millions):



	Quarters Ended
	March 31, 2019			March 25, 2018
Net sales
Aeronautics	$	5,584		$	4,398
Missiles and Fire Control	2,350			1,677
Rotary and Mission Systems	3,762			3,223
Space	2,640			2,337
Total net sales	$	14,336		$	11,635
Operating profit
Aeronautics	$	585		$	474
Missiles and Fire Control	417			261
Rotary and Mission Systems	379			311
Space	334			264
Total business segment operating profit	1,715			1,310
Unallocated items
FAS/CAS operating adjustment ^(a)	512			451
Stock-based compensation	(37		)	(38		)
Other, net	93			2
Total unallocated items	568			415
Total consolidated operating profit	$	2,283		$	1,725
Intersegment sales
Aeronautics	$	42		$	25
Missiles and Fire Control	121			95
Rotary and Mission Systems	580			461
Space	68			45
Total intersegment sales	$	811		$	626


^(a)	The FAS/CAS operating adjustment represents the difference between the service cost component of FAS pension expense and total pension costs recoverable on U.S. Government contracts as determined in accordance with CAS.

Our total net FAS/CAS pension adjustment for the quarters ended March 31, 2019 and March 25, 2018, including the service and non-service cost components of FAS pension expense for our qualified defined benefit pension plans, were as follows (in millions):



	Quarters Ended
	March 31, 2019			March 25, 2018
Total FAS expense and CAS costs
FAS pension expense	$	(273	)	$	(356	)
Less: CAS pension cost	641			608
Net FAS/CAS pension adjustment	$	368		$	252

Service and non-service cost reconciliation
FAS pension service cost	$	(129	)	$	(157	)
Less: CAS pension cost	641			608
FAS/CAS operating adjustment	512			451
Non-operating FAS pension cost^(a)	(144		)	(199		)
Net FAS/CAS pension adjustment	$	368		$	252


^(a)	The non-service cost components of net periodic benefit cost relate only to our qualified defined benefit pension plans. In addition to the non service cost components in the table above, we incurred similar costs for our other postretirement benefit plans of $30 million and $17 million for the quarters ended March 31, 2019 and March 25, 2018.

We recover CAS pension and other postretirement benefit plan cost through the pricing of our products and services on U.S. Government contracts and, therefore, recognize CAS cost in each of our business segment’s net sales and cost of sales. Our consolidated financial statements must present FAS pension and other postretirement benefit plan expense calculated in accordance with FAS requirements under U.S. GAAP. The operating portion of the net FAS/CAS pension adjustment represents the difference between the service cost component of FAS pension expense and total CAS pension cost. The non-service FAS pension cost component is included in other non-operating expense, net in our consolidated statements of earnings. The net FAS/CAS pension adjustment increases or decreases CAS pension cost to equal total FAS pension cost (both service and non-service).

Net sales by products and services, contract type, customer, and geographic region were as follows (in millions):



	Quarter Ended March 31, 2019
	Aeronautics		MFC		RMS		Space		Total
Net sales
Products	$	4,796	$	1,916	$	3,059	$	2,199	$	11,970
Services	788		434		703		441		2,366
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by contract type
Fixed-price	$	4,170	$	1,535	$	2,619	$	523	$	8,847
Cost-reimbursable	1,414		815		1,143		2,117		5,489
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by customer
U.S. Government	$	3,435	$	1,633	$	2,675	$	2,236	$	9,979
International ^(a)	2,095		670		995		395		4,155
U.S. commercial and other	54		47		92		9		202
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by geographic region
United States	$	3,489	$	1,680	$	2,767	$	2,245	$	10,181
Asia Pacific	906		122		330		8		1,366
Europe	798		122		198		381		1,499
Middle East	337		413		285		6		1,041
Other	54		13		182		—		249
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336



	Quarter Ended March 25, 2018
	Aeronautics		MFC		RMS		Space		Total
Net sales
Products	$	3,770	$	1,353	$	2,717	$	1,922	$	9,762
Services	628		324		506		415		1,873
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by contract type
Fixed-price	$	3,215	$	1,112	$	2,208	$	400	$	6,935
Cost-reimbursable	1,183		565		1,015		1,937		4,700
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by customer
U.S. Government	$	2,765	$	1,088	$	2,356	$	1,870	$	8,079
International ^(a)	1,577		554		781		456		3,368
U.S. commercial and other	56		35		86		11		188
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by geographic region
United States	$	2,821	$	1,123	$	2,442	$	1,881	$	8,267
Asia Pacific	754		98		324		23		1,199
Europe	508		69		155		426		1,158
Middle East	257		380		171		7		815
Other	58		7		131		—		196
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635


^(a)	International sales include foreign military sales (FMS) contracted through the U.S. Government and direct commercial sales to international governments and other international customers.

Total assets for each of our business segments were as follows (in millions):



	March 31, 2019		December 31, 2018
Assets
Aeronautics	$	9,469	$	8,435
Missiles and Fire Control	5,678		5,017
Rotary and Mission Systems	18,914		18,333
Space	5,792		5,445
Total business segment assets	39,853		37,230
Corporate assets ^(a)	7,831		7,646
Total assets	$	47,684	$	44,876


^(a)	Corporate assets primarily include cash and cash equivalents, deferred income taxes, environmental receivables, and investments held in a separate trust to fund certain of our non-qualified deferred compensation plans.

Our Aeronautics business segment includes our largest program, the F-35 Lightning II Joint Strike Fighter, an international multi-role, multi-variant, stealth fighter aircraft. Net sales for the F-35 program represented approximately 26% of our total consolidated net sales for the quarter ended March 31, 2019 and 24% of our total consolidated net sales for the quarter ended March 25, 2018.

CONTRACT ASSETS AND LIABILITIES

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

CONTRACT ASSETS AND LIABILITIES

Contract assets include unbilled amounts typically resulting from sales under contracts when the percentage-of-completion cost-to-cost method of revenue recognition is utilized and revenue recognized exceeds the amount billed to the customer. Contract liabilities include advance payments and billings in excess of revenue recognized. Contract assets and contract liabilities were as follows (in millions):



	March 31, 2019		December 31, 2018
Contract assets	$	10,497	$	9,472
Contract liabilities	6,796		6,491

Contract assets increased $1.0 billion during the quarter ended March 31, 2019, primarily due to the recognition of revenue related to the satisfaction or partial satisfaction of performance obligations during the quarter ended March 31, 2019 for which we have not yet billed our customers. There were no significant impairment losses related to our contract assets during the quarters ended March 31, 2019 and March 25, 2018.

Contract liabilities increased $305 million during the quarter ended March 31, 2019, primarily due to payments received in advance of our satisfaction or partial satisfaction of these performance obligations. During the quarter ended March 31, 2019, we recognized $1.8 billion of our contract liabilities at December 31, 2018 as revenue. During the quarter ended March 25, 2018, we recognized $1.9 billion of our contract liabilities at December 31, 2017 as revenue.

INVENTORIES

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

INVENTORIES

Inventories consisted of the following (in millions):



	March 31, 2019		December 31, 2018
Materials, spares and supplies	$	438	$	446
Work-in-process	2,495		2,161
Finished goods	352		390
Total inventories	$	3,285	$	2,997

Costs incurred to fulfill a customer contract in advance of the contract being awarded are included in inventories as work-in-process if we determine that those costs relate directly to a customer contract or to an anticipated customer

contract that we can specifically identify and contract award is probable, the costs generate or enhance resources that will be used in satisfying performance obligations, and the costs are recoverable (referred to as pre-contract costs). Pre-contract costs that are initially capitalized in inventory are generally recognized as cost of sales consistent with the transfer of products and services to the customer upon the receipt of the anticipated contract. All other pre-contract costs, including start-up costs, are expensed as incurred. As of March 31, 2019 and December 31, 2018, $468 million and $443 million of pre-contract costs were included in inventory.

LEASES

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

LEASES

We evaluate whether our contractual arrangements contain leases at the inception of such arrangements. Specifically, we consider whether we can control the underlying asset and have the right to obtain substantially all of the economic benefits or outputs from the asset. Substantially all of our leases are long-term operating leases with fixed payment terms. We do not have significant financing leases. Our right-of-use (ROU) operating lease assets represent our right to use an underlying asset for the lease term, and our operating lease liabilities represent our obligation to make lease payments. ROU operating lease assets are recorded in other noncurrent assets in our consolidated balance sheet. Operating lease liabilities are recorded in other current liabilities or other noncurrent liabilities in our consolidated balance sheet based on their contractual due dates.

Both the ROU operating lease asset and liability are recognized as of the lease commencement date at the present value of the lease payments over the lease term. Most of our leases do not provide an implicit rate that can readily be determined. Therefore, we use a discount rate based on our incremental borrowing rate, which is determined using our credit rating and information available as of the commencement date. ROU operating lease assets include lease payments made at or before the lease commencement date and exclude lease incentives.

Our operating lease agreements may include options to extend the lease term or terminate it early. We include options to extend or terminate leases in the ROU operating lease asset and liability when it is reasonably certain we will exercise these options. Operating lease expense is recognized on a straight-line basis over the lease term and is included in cost of sales on our consolidated statement of earnings.

We have operating lease arrangements with lease and non-lease components. The non-lease components in our arrangements are not significant when compared to the lease components. For all operating leases, we account for the lease and non-lease components as a single component. Additionally, for certain equipment leases, we apply a portfolio approach to recognize operating lease ROU assets and liabilities. We evaluate ROU assets for impairment consistent with our property, plant and equipment policy disclosure included in our 2018 Form 10‑K.

Generally, we enter into operating lease agreements for facilities, land and equipment. Our ROU operating lease assets were $969 million at March 31, 2019. Operating lease liabilities were $1.1 billion, of which $812 million were classified as noncurrent, at March 31, 2019. New ROU operating lease assets and liabilities entered into during the quarter ended March 31, 2019 were not significant. The weighted average remaining lease term and discount rate for our operating leases were approximately 9.3 years and 3.4% at March 31, 2019.

During the quarters ended March 31, 2019 and March 25, 2018, we recognized operating lease expense of $59 million and $60 million. In addition, we made cash payments of $57 million for operating leases during the quarter ended March 31, 2019, which are included in cash flows from operating activities in our consolidated statement of cash flows.

Future minimum lease commitments at March 31, 2019 were as follows (in millions):



	Total		Remainder of 2019		2020		2021		2022		2023		Thereafter
Operating leases	$	1,243	$	234	$	175	$	147	$	117	$	96	$	474
Less: imputed interest	$	182
Total	$	1,061

POSTRETIREMENT BENEFIT PLANS

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

POSTRETIREMENT BENEFIT PLANS

Our pretax net periodic benefit cost related to our qualified defined benefit pension plans and retiree medical and life insurance plans consisted of the following (in millions):



	Quarters Ended
	March 31, 2019			March 25, 2018
Qualified defined benefit pension plans
Service cost	$	129		$	157
Interest cost	452			435
Expected return on plan assets	(575		)	(599		)
Recognized net actuarial losses	351			444
Amortization of prior service credits	(84		)	(81		)
Total net periodic benefit cost	$	273		$	356
Retiree medical and life insurance plans
Service cost	$	4		$	5
Interest cost	24			23
Expected return on plan assets	(28		)	(34		)
Recognized net actuarial losses	1			1
Amortization of prior service costs	10			4
Total net periodic benefit (credit) cost	$	11		$	(1	)

We record the service cost component of net periodic benefit cost as part of cost of sales and the non-service cost components of net periodic benefit cost as part of other non-operating expense, net in the consolidated statements of earnings.

The recognized net actuarial losses and amortization of prior service credits or costs in the table above, along with similar costs related to our other postretirement benefit plans ($11 million for the quarter ended March 31, 2019 and $14 million for the quarter ended March 25, 2018) were reclassified from accumulated other comprehensive loss (AOCL) and recorded as a component of net periodic benefit cost for the periods presented. These costs totaled $289 million ($227 million, net of tax) during the quarter ended March 31, 2019 and $382 million ($300 million, net of tax) during the quarter ended March 25, 2018 and were recorded on our consolidated statements of comprehensive income as an increase to other comprehensive income.

The funding of our qualified defined benefit pension plans is determined in accordance with the Employee Retirement Income Security Act of 1974 (ERISA), as amended by the Pension Protection Act of 2006 (PPA), along with consideration of CAS and Internal Revenue Code rules. During the quarter ended March 31, 2019, there were no contributions to our qualified defined benefit pension plans. During the quarter ended March 25, 2018, we contributed $1.5 billion to our qualified defined benefit pension plans.

LEGAL PROCEEDINGS AND CONTINGENCIES	3 Months Ended
LEGAL PROCEEDINGS AND CONTINGENCIES	Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
LEGAL PROCEEDINGS AND CONTINGENCIES	LEGAL PROCEEDINGS AND CONTINGENCIES We are a party to or have property subject to litigation and other proceedings that arise in the ordinary course of our business, including matters arising under provisions relating to the protection of the environment and are subject to contingencies related to certain businesses we previously owned. These types of matters could result in fines, penalties, compensatory or treble damages or non-monetary sanctions or relief. We believe the probability is remote that the outcome of each of these matters, including the legal proceedings described below, will have a material adverse effect on the corporation as a whole, notwithstanding that the unfavorable resolution of any matter may have a material effect on our net earnings in any particular interim reporting period. Among the factors that we consider in this assessment are the nature of existing legal proceedings and claims, the asserted or possible damages or loss contingency (if estimable), the progress of the case, existing law and precedent, the opinions or views of legal counsel and other advisers, our experience in similar cases and the experience of other companies, the facts available to us at the time of assessment and how we intend to respond to the proceeding or claim. Our assessment of these factors may change over time as individual proceedings or claims progress. Although we cannot predict the outcome of legal or other proceedings with certainty, where there is at least a reasonable possibility that a loss may have been incurred, GAAP requires us to disclose an estimate of the reasonably possible loss or range of loss or make a statement that such an estimate cannot be made. We follow a thorough process in which we seek to estimate the reasonably possible loss or range of loss, and only if we are unable to make such an estimate do we conclude and disclose that an estimate cannot be made. Accordingly, unless otherwise indicated below in our discussion of legal proceedings, a reasonably possible loss or range of loss associated with any individual legal proceeding cannot be estimated. Legal Proceedings As a result of our acquisition of Sikorsky Aircraft Corporation (Sikorsky), we assumed the defense of and any potential liability for two civil False Claims Act lawsuits pending in the U.S. District Court for the Eastern District of Wisconsin. In October 2014, the U.S. Government filed a complaint in intervention in the first suit, which was brought by qui tam relator Mary Patzer, a former Derco Aerospace (Derco) employee. In May 2017, the U.S. Government filed a complaint in intervention in the second suit, which was brought by qui tam relator Peter Cimma, a former Sikorsky Support Services, Inc. (SSSI) employee. In November 2017, the Court consolidated the cases into a single action for discovery and trial. The U.S. Government alleges that Sikorsky and two of its wholly-owned subsidiaries, Derco and SSSI, violated the civil False Claims Act and the Truth in Negotiations Act in connection with a contract the U.S. Navy awarded to SSSI in June 2006 to support the Navy’s T-34 and T-44 fixed-wing turboprop training aircraft. SSSI subcontracted with Derco, primarily to procure and manage spare parts for the training aircraft. The U.S. Government contends that SSSI overbilled the Navy on the contract as the result of Derco’s use of prohibited cost-plus-percentage-of-cost pricing to add profit and overhead costs as a percentage of the price of the spare parts that Derco procured and then sold to SSSI. The U.S. Government also alleges that Derco’s claims to SSSI, SSSI’s claims to the Navy, and SSSI’s yearly Certificates of Final Indirect Costs from 2006 through 2012 were false and that SSSI submitted inaccurate cost or pricing data in violation of the Truth in Negotiations Act for a sole-sourced, follow-on “bridge” contract. The U.S. Government’s complaints assert common law claims for breach of contract and unjust enrichment. The U.S. Government further alleged violations of the Anti-Kickback Act and False Claims Act based on a monthly “chargeback,” through which SSSI billed Derco for the cost of certain SSSI personnel, allegedly in exchange for SSSI’s permitting a pricing arrangement that was “highly favorable” to Derco. On January 12, 2018, the Corporation filed a partial motion to dismiss intended to narrow the U.S. Government’s claims, including by seeking dismissal of the Anti-Kickback Act allegations. The Corporation also moved to dismiss Cimma as a party under the False Claims Act’s first-to-file rule, which permits only the first relator to recover in a pending case. The District Court granted these motions, in part, on July 20, 2018, dismissing the Government’s claims under the Anti-Kickback Act and dismissing Cimma as a party to the litigation. The U.S. Government seeks damages of approximately $52 million, subject to trebling, plus statutory penalties. We believe that we have legal and factual defenses to the U.S. Government’s remaining claims. Although we continue to evaluate our liability and exposure, we do not currently believe that it is probable that we will incur a material loss. If, contrary to our expectations, the U.S. Government prevails in this matter and proves damages at or near $52 million and is successful in having such damages trebled, the outcome could have an adverse effect on our results of operations in the period in which a liability is recognized and on our cash flows for the period in which any damages are paid. On February 8, 2019, the Department of Justice (DOJ) filed a complaint in the U.S. District Court for the Eastern District of Washington alleging, among other counts, civil False Claims Act (FCA) and civil Anti-Kickback Act (AKA) violations against Mission Support Alliance, LLC (MSA), Lockheed Martin, Lockheed Martin Services, Inc. (LMSI) and a current Lockheed Martin vice president. The dollar amount of damages sought is not specified but DOJ seeks treble damages with respect to the FCA and penalties that are subject to doubling under the AKA. Lockheed Martin earlier disclosed investigations by the Department of Energy (DOE) and DOJ (the Investigations) and DOJ’s intent to bring suit. The Investigations relate primarily to information technology services performed by LMSI under a subcontract to MSA and the pricing by MSA and LMSI of those services as well as Lockheed Martin’s payment of standard incentive compensation to certain employees who were seconded to MSA, including the vice president. MSA is a joint venture that holds a prime contract to provide infrastructure support services at DOE’s Hanford facility. On April 23, 2019, the parties each filed partial motions to dismiss the U.S. Government’s FCA and AKA allegations. On August 16, 2016, we divested our former Information Systems & Global Solutions (IS&GS) business segment to Leidos Holdings, Inc. (Leidos) in a transaction that resulted in IS&GS, now known as Leidos Innovations Corporation (Leidos Innovations), becoming a wholly owned subsidiary of Leidos (the Transaction). In the Transaction, Leidos acquired IS&GS’ interest in MSA and the liabilities related to Lockheed Martin’s participation in MSA. Included within the liabilities assumed were those associated with the Investigations. Lockheed Martin transferred to Leidos a reserve of approximately $38 million established by Lockheed Martin with respect to its potential liability and that of its affiliates arising from the Investigations and agreed to indemnify Leidos Innovations with respect to the liabilities assumed for damages to Leidos Innovations and an enumerated list of subsidiaries of Leidos Innovations related to the Investigations for 100% of amounts in excess of this reserve up to $64 million and 50% of amounts in excess of $64 million. We cannot reasonably estimate our exposure at this time, but it is possible that a settlement by or judgment against any of the defendants could implicate Lockheed Martin’s indemnification obligations as described above. At present, in view of what we believe to be the strength of the defenses, our belief that Leidos assumed the liabilities, and our view of the structure of the indemnity, we do not believe it probable that we will incur a material loss and have not taken any reserve. On April 24, 2009, we filed a declaratory judgment action against the New York Metropolitan Transportation Authority and its Capital Construction Company (collectively, the MTA) asking the U.S. District Court for the Southern District of New York to find that the MTA is in material breach of our agreement based on the MTA’s failure to provide access to sites where work must be performed and the customer-furnished equipment necessary to complete the contract. The MTA filed an answer and counterclaim alleging that we breached the contract and subsequently terminated the contract for alleged default. The primary damages sought by the MTA are the costs to complete the contract and potential re-procurement costs. While we are unable to estimate the cost of another contractor to complete the contract and the costs of re-procurement, we note that our contract with the MTA had a total value of $323 million, of which $241 million was paid to us, and that the MTA is seeking damages of approximately $190 million. We dispute the MTA’s allegations and are defending against them. Additionally, following an investigation, our sureties on a performance bond related to this matter, who were represented by independent counsel, concluded that the MTA’s termination of the contract was improper. Finally, our declaratory judgment action was later amended to include claims for monetary damages against the MTA of approximately $95 million. This matter was taken under submission by the District Court in December 2014, after a five-week bench trial and the filing of post-trial pleadings by the parties. We continue to await a decision from the District Court. Although this matter relates to our former IS&GS business, we retained the litigation when we divested IS&GS in 2016. Environmental Matters We are involved in proceedings and potential proceedings relating to soil, sediment, surface water, and groundwater contamination, disposal of hazardous substances, and other environmental matters at several of our current or former facilities, facilities for which we may have contractual responsibility, and at third-party sites where we have been designated as a potentially responsible party (PRP). A substantial portion of environmental costs will be included in our net sales and cost of sales in future periods pursuant to U.S. Government regulations. At the time a liability is recorded for future environmental costs, we record a receivable for estimated future recovery considered probable through the pricing of products and services to agencies of the U.S. Government, regardless of the contract form (e.g., cost-reimbursable, fixed-price). We continually evaluate the recoverability of our environmental receivables by assessing, among other factors, U.S. Government regulations, our U.S. Government business base and contract mix, our history of receiving reimbursement of such costs, and efforts by some U.S. Government representatives to limit such reimbursement. We include the portion of those environmental costs expected to be allocated to our non-U.S. Government contracts, or that is determined not to be recoverable under U.S. Government contracts, in our cost of sales at the time the liability is established. At March 31, 2019 and December 31, 2018, the aggregate amount of liabilities recorded relative to environmental matters was $830 million and $864 million, most of which are recorded in other noncurrent liabilities on our consolidated balance sheets. We have recorded receivables totaling $721 million and $750 million at March 31, 2019 and December 31, 2018, most of which are recorded in other noncurrent assets on our consolidated balance sheets for the estimated future recovery of these costs, as we consider the recovery probable based on the factors previously mentioned. We project costs and recovery of costs over approximately 20 years. Environmental remediation activities usually span many years, which makes estimating liabilities a matter of judgment because of uncertainties with respect to assessing the extent of the contamination as well as such factors as changing remediation technologies and changing regulatory environmental standards. There are a number of former and present operating facilities that we are monitoring or investigating for potential future remediation. We perform quarterly reviews of the status of our environmental remediation sites and the related liabilities and receivables. Additionally, in our quarterly reviews, we consider these and other factors in estimating the timing and amount of any future costs that may be required for remediation activities, and record a liability when it is probable that a loss has occurred and the loss can be reasonably estimated. The amount of liability recorded is based on our estimate of the costs to be incurred for remediation at a particular site. We do not discount the recorded liabilities, as the amount and timing of future cash payments are not fixed or cannot be reliably determined. We reasonably cannot determine the extent of our financial exposure in all cases as, although a loss may be probable or reasonably possible, in some cases it is not possible at this time to estimate the loss or reasonably possible loss or range of loss. We also pursue claims for recovery of costs incurred or for contribution to site remediation costs against other PRPs, including the U.S. Government, and are conducting remediation activities under various consent decrees, orders, and agreements relating to soil, groundwater, sediment, or surface water contamination at certain sites of former or current operations. Under agreements related to certain sites in California and New York, the U.S. Government reimburses us an amount equal to a percentage, specific to each site, of expenditures for certain remediation activities in the U.S. Government’s capacity as a PRP under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA). In addition to the proceedings and potential proceedings discussed above, California previously established a maximum level of the contaminant hexavalent chromium in drinking water of 10 parts per billion (ppb). This standard was successfully challenged by the California Manufacturers and Technology Association (CMTA) for failure to conduct the required economic feasibility analysis. In response to the court’s ruling, the State Water Resources Control Board (State Board), a branch of the California Environmental Protection Agency, withdrew the hexavalent chromium standard from the published regulations, leaving only the 50 ppb standard for total chromium. The State Board has indicated it will work to re-establish a hexavalent chromium standard. If the standard for hexavalent chromium is re‑established at 10 ppb or above, it will not have a material impact on our existing remediation costs in California. Further, the U.S. Environmental Protection Agency (U.S. EPA) is considering whether to regulate hexavalent chromium. California is also reevaluating its existing drinking water standard of 6 ppb for perchlorate, and the U.S. EPA is taking steps to regulate perchlorate in drinking water. If substantially lower standards are adopted, in either California or at the federal level for perchlorate or for hexavalent chromium, we expect a material increase in our estimates for environmental liabilities and the related assets for the portion of the increased costs that are probable of future recovery in the pricing of our products and services for the U.S. Government. The amount that would be allocable to our non-U.S. Government contracts or that is determined not to be recoverable under U.S. Government contracts would be expensed, which may have a material effect on our earnings in any particular interim reporting period. Letters of Credit, Surety Bonds and Third-Party Guarantees We have entered into standby letters of credit and surety bonds issued on our behalf by financial institutions, and we have directly issued guarantees to third parties primarily relating to advances received from customers and the guarantee of future performance on certain contracts. Letters of credit and surety bonds generally are available for draw down in the event we do not perform. In some cases, we may guarantee the contractual performance of third parties such as venture partners. We had total outstanding letters of credit, surety bonds, and third-party guarantees aggregating $3.4 billion and $3.6 billion at March 31, 2019 and December 31, 2018. Third-party guarantees do not include guarantees to subsidiaries and other consolidated entities. At March 31, 2019 and December 31, 2018, third-party guarantees totaled approximately $905 million and $850 million, of which approximately 66% and 65% related to guarantees of contractual performance of ventures to which we currently are or previously were a party. This amount represents our estimate of the maximum amount we would expect to incur upon the contractual non-performance of the venture, venture partners or divested businesses. Generally, we also have cross-indemnities in place that may enable us to recover amounts that may be paid on behalf of a venture partner. In determining our exposures, we evaluate the reputation, performance on contractual obligations, technical capabilities and credit quality of our current and former venture partners and the transferee under novation agreements all of which include a guarantee as required by the FAR. There were no material amounts recorded in our financial statements related to third-party guarantees or novation agreements.

FAIR VALUE MEASUREMENTS

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

FAIR VALUE MEASUREMENTS

Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions):



	March 31, 2019						December 31, 2018
	Total		Level 1		Level 2		Total		Level 1		Level 2
Assets
Mutual funds	$	984	$	984	$	—	$	978	$	978	$	—
U.S. Government securities	112		—		112		105		—		105
Other securities	180		65		115		144		28		116
Derivatives	20		—		20		22		—		22
Liabilities
Derivatives	78		—		78		61		—		61
Assets measured at NAV ^(a)
Other commingled funds	19						18


^(a)	Net Asset Value (NAV) is the total value of the fund divided by the number of the fund’s shares outstanding.

Substantially all assets measured at fair value, other than derivatives, represent investments held in a separate trust to fund certain of our non-qualified deferred compensation plans and are recorded in other noncurrent assets on our consolidated balance sheets. The fair values of mutual funds and certain other securities are determined by reference to the quoted market price per unit in active markets multiplied by the number of units held without consideration of transaction costs. The fair values of U.S. Government and other securities are determined using pricing models that use observable inputs (e.g., interest rates and yield curves observable at commonly quoted intervals), bids provided by brokers or dealers or quoted prices of securities with similar characteristics. The fair values of derivative instruments, which consist of foreign currency exchange forward and interest rate swap contracts, are primarily determined based on the present value of future cash flows using model-derived valuations that use observable inputs such as interest rates, credit spreads and foreign currency exchange rates.

The derivatives outstanding at both March 31, 2019 and December 31, 2018 consist of foreign currency forward contracts, interest rate swaps and foreign currency related contract embedded derivatives. We use derivative instruments principally to reduce our exposure to market risks from changes in foreign currency exchange rates and interest rates. We do not enter into or hold derivative instruments for speculative trading purposes. We transact business globally and are subject to risks associated with changing foreign currency exchange rates. We enter into foreign currency hedges such as forward and option contracts that change in value as foreign currency exchange rates change. These contracts hedge forecasted foreign currency transactions in order to mitigate fluctuations in our earnings and cash flows associated with changes in foreign currency exchange rates. We designate foreign currency hedges as cash flow hedges. We also are exposed to the impact of interest rate changes primarily through our borrowing activities. For fixed rate borrowings, we may use variable interest rate swaps, effectively converting fixed rate borrowings to variable rate borrowings, in order to reduce the amount of interest paid. These swaps are designated as fair value hedges. For variable rate borrowings, we may use fixed interest rate swaps, effectively converting variable rate borrowings to fixed rate borrowings, in order to mitigate the impact of interest rate changes on earnings. These swaps are designated as cash flow hedges. We also may enter into derivative instruments that are not designated as hedges and do not qualify for hedge accounting, which are intended to mitigate certain economic exposures.

The aggregate notional amount of our outstanding interest rate swaps at both March 31, 2019 and December 31, 2018 was $1.3 billion. The aggregate notional amount of our outstanding foreign currency hedges at March 31, 2019 and December 31, 2018 was $3.4 billion and $3.5 billion. The fair values of our outstanding interest rate swaps and foreign currency hedges at March 31, 2019 and December 31, 2018 were not significant. Derivative instruments did not have a material impact on net earnings and comprehensive income during the quarters ended March 31, 2019 and March 25, 2018. Substantially all of our derivatives are designated for hedge accounting.

In addition to the financial instruments listed in the table above, we hold other financial instruments, including debt and commercial paper. The estimated fair value of our outstanding debt and commercial paper based on Level 2 inputs was $16.3 billion and $15.4 billion at March 31, 2019 and December 31, 2018. The outstanding principal amount of debt and commercial paper was $15.1 billion and $15.3 billion at March 31, 2019 and December 31, 2018, excluding unamortized discounts and issuance costs of $1.2 billion.

STOCKHOLDERS' EQUITY

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

STOCKHOLDERS' EQUITY

STOCKHOLDERS’ EQUITY

Repurchases of Common Stock

During the quarter ended March 31, 2019, we repurchased 1.0 million shares of our common stock for $284 million, some of which was settled subsequent to the end of the first quarter. The total remaining authorization for future common share repurchases under our share repurchase program was $2.7 billion as of March 31, 2019. As we repurchase our common shares, we reduce common stock for the $1 of par value of the shares repurchased, with the excess purchase price over par value recorded as a reduction of additional paid-in capital. If additional paid-in capital is reduced to zero, we record the remainder of the excess purchase price over par value as a reduction of retained earnings. Due to the volume of repurchases and the prices at which these were made, additional paid-in capital was reduced to zero, with the remainder of the excess purchase price over par value of $237 million and $274 million recorded as a reduction to retained earnings during the quarters ended March 31, 2019 and March 25, 2018.

Dividends

We declared cash dividends totaling $623 million ($2.20 per share) and $573 million ($2.00 per share) during the quarters ended March 31, 2019 and March 25, 2018. Dividends paid during the quarters ended March 31, 2019 and March 25, 2018 are higher than dividends declared due to dividend-equivalents paid to holders of RSUs. These dividend-equivalents are accrued during the RSU vesting period and are paid upon the vesting of the RSU.

Restricted Stock Unit Grants

During the quarter ended March 31, 2019, we granted certain employees approximately 0.6 million RSUs with a grant date fair value of $303.60 per RSU. The grant date fair value of these RSUs is equal to the closing market price of our common stock on the grant date less a discount to reflect the delay in payment of dividend-equivalent cash payments that are made only upon vesting, which is generally three years from the grant date. We recognize the grant date fair value of RSUs, less estimated forfeitures, as compensation expense ratably over the requisite service period, which is shorter than the vesting period if the employee is retirement eligible on the date of grant or will become retirement eligible before the end of the vesting period.

Accumulated Other Comprehensive Loss

Changes in the balance of AOCL, net of tax, consisted of the following (in millions):



	Postretirement Benefit Plans			Other, net			AOCL
Balance at December 31, 2018	$	(14,254	)	$	(67	)	$	(14,321	)
Other comprehensive income before reclassifications	—			(5		)	(5		)
Amounts reclassified from AOCL
Recognition of net actuarial losses ^(a)	287			—			287
Amortization of net prior service credits ^(a)	(60		)	—			(60		)
Other	—			5			5
Total reclassified from AOCL	227			5			232
Total other comprehensive income	227			—			227
Balance at March 31, 2019	$	(14,027	)	$	(67	)	$	(14,094	)

Balance at December 31, 2017	$	(12,559	)	$	20		$	(12,539	)
Other comprehensive income before reclassifications	—			55			55
Amounts reclassified from AOCL
Recognition of net actuarial losses ^(a)	364			—			364
Amortization of net prior service credits ^(a)	(64		)	—			(64		)
Other	—			3			3
Total reclassified from AOCL	300			3			303
Total other comprehensive income	300			58			358
Reclassification of income tax effects from tax reform^(b)	(2,396		)	(12		)	(2,408		)
Balance at March 25, 2018	$	(14,655	)	$	66		$	(14,589	)


^(a)	Reclassifications from AOCL related to our postretirement benefit plans were recorded as a component of net periodic benefit cost for each period presented (see “Note 7 – Postretirement Benefit Plans”).

^(b)

Upon adoption of ASU 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) during the quarter ended March 25, 2018, we reclassified the impact of the income tax effects related to the Tax Cuts and Jobs Act (the Tax Act) from AOCL to retained earnings by the same amount with zero impact to total equity.

OTHER	3 Months Ended
OTHER	Mar. 31, 2019
Accounting Policies [Abstract]
OTHER	OTHER Changes in Estimates Significant estimates and assumptions are made in estimating contract sales and costs, including the profit booking rate. At the outset of a long-term contract, we identify and monitor risks to the achievement of the technical, schedule and cost aspects of the contract, as well as variable consideration, and assess the effects of those risks on our estimates of sales and total costs to complete the contract. The estimates consider the technical requirements (e.g., a newly-developed product versus a mature product), the schedule and associated tasks (e.g., the number and type of milestone events) and costs (e.g., material, labor, subcontractor, overhead, general and administrative and the estimated costs to fulfill our industrial cooperation agreements, sometimes referred to as offset or localization agreements, required under certain contracts with international customers). The initial profit booking rate of each contract considers risks surrounding the ability to achieve the technical requirements, schedule and costs in the initial estimated total costs to complete the contract. Profit booking rates may increase during the performance of the contract if we successfully retire risks surrounding the technical, schedule and cost aspects of the contract, which decreases the estimated total costs to complete the contract or may increase the variable consideration we expect to receive on the contract. Conversely, our profit booking rates may decrease if the estimated total costs to complete the contract increase or our estimates of variable consideration we expect to receive decrease. All of the estimates are subject to change during the performance of the contract and may affect the profit booking rate. When estimates of total costs to be incurred on a contract exceed total estimates of the transaction price, a provision for the entire loss is determined at the contract level and is recorded in the period in which the loss is determined. Comparability of our segment sales, operating profit and operating margin may be impacted favorably or unfavorably by changes in profit booking rates on our contracts for which we recognize revenue over time using the percentage-of-completion cost-to-cost method to measure progress towards completion. Increases in the profit booking rates, typically referred to as risk retirements, usually relate to revisions in the estimated total costs to fulfill the performance obligations that reflect improved conditions on a particular contract. Conversely, conditions on a particular contract may deteriorate, resulting in an increase in the estimated total costs to fulfill the performance obligations and a reduction in the profit booking rate. Increases or decreases in profit booking rates are recognized in the current period and reflect the inception-to-date effect of such changes. Segment operating profit and margin may also be impacted favorably or unfavorably by other items, which may or may not impact sales. Favorable items may include the positive resolution of contractual matters, cost recoveries on severance and restructuring charges, insurance recoveries and gains on sales of assets. Unfavorable items may include the adverse resolution of contractual matters; restructuring charges, except for significant severance actions, which are excluded from segment operating results; reserves for disputes; certain asset impairments; and losses on sales of certain assets. Our consolidated net adjustments not related to volume, including net profit booking rate adjustments and other matters, increased segment operating profit by approximately $565 million during the quarter ended March 31, 2019 and $420 million during the quarter ended March 25, 2018. These adjustments increased net earnings by approximately $446 million ($1.57 per share) during the quarter ended March 31, 2019 and $332 million ($1.15 per share) during the quarter ended March 25, 2018. We recognized net sales from performance obligations satisfied in prior periods of approximately $670 million during the quarter ended March 31, 2019 and $415 million during the quarter ended March 25, 2018, which primarily relate to changes in profit booking rates that impacted revenue. We are responsible for a program to design, develop and construct a ground-based radar. The program has experienced performance issues for which we have periodically accrued reserves. During the quarter ending March 31, 2019, we revised our estimated costs to complete the program and recorded a charge of approximately $50 million ($38 million, or $0.13 per share, after tax) at our RMS business segment, which resulted in cumulative losses of approximately $195 million on this program as of March 31, 2019. We may continue to experience issues related to customer requirements and our performance under this contract and have to record additional charges. However, based on the losses previously recorded and our current estimate of the sales and costs to complete the program, at this time we do not anticipate that additional losses, if any, would be material to our operating results or financial condition. As previously disclosed in our 2018 Form 10-K, we have two commercial satellite programs at our Space business segment for which we have experienced performance issues related to the development and integration of a modernized LM 2100 satellite platform. These programs are for the delivery of three satellites in total, including one that launched in February 2019 and one that launched in April 2019. We have periodically revised our estimated costs to complete these developmental commercial programs. During the quarter ended March 31, 2019, we recorded losses of approximately $20 million ($15 million, or $0.05 per share, after tax), which resulted in cumulative losses of approximately $410 million for these programs. While these losses reflect our estimated total losses on the programs, we will continue to incur unrecoverable general and administrative costs each period until we complete the contract for the third satellite. While we have launched two satellites from one program, the third satellite program remains developmental and further challenges in the delivery and integration of new satellite technology, anomalies discovered during system testing requiring repair or rework, further schedule delays, and penalties could require that we record additional loss reserves which could be material to our operating results. We are late to the contract delivery schedule for the third satellite. If we are not able to deliver the third satellite by the contract termination date, the customer could seek to exercise a termination right under the contract, in which case we would have to refund the payments we have received and pay certain penalties. However, we think that it is not probable that the customer will seek to exercise any termination rights. As previously disclosed in our 2018 Form 10-K, we are responsible for designing, developing and installing an upgraded turret for the Warrior Capability Sustainment Program at our MFC business segment. As of March 31, 2019, cumulative losses remain at approximately $140 million. We may continue to experience issues related to customer requirements and our performance under this contract and have to record additional reserves. However, based on the losses already recorded and our current estimate of the sales and costs to complete the program, at this time we do not anticipate that additional losses, if any, would be material to our operating results or financial condition. Backlog Backlog (i.e., unfulfilled or remaining performance obligations) represents the sales we expect to recognize for our products and services for which control has not yet transferred to the customer. For our cost-reimbursable and fixed-priced-incentive contracts, the estimated consideration we expect to receive pursuant to the terms of the contract may exceed the contractual award amount. The estimated consideration is determined at the outset of the contract and is continuously reviewed throughout the contract period. In determining the estimated consideration, we consider the risks related to the technical, schedule and cost impacts to complete the contract and an estimate of any variable consideration. Periodically, we review these risks and may increase or decrease backlog accordingly. As the risks on such contracts are successfully retired, the estimated consideration from customers may be reduced, resulting in a reduction of backlog without a corresponding recognition of sales. As of March 31, 2019, our ending backlog was $133.5 billion. We expect to recognize approximately 37% of our backlog over the next 12 months and approximately 65% over the next 24 months as revenue, with the remainder recognized thereafter. Severance and Restructuring Charges During the second quarter of 2018, we recorded charges totaling $96 million ($76 million, or $0.26 per share, after tax) related to certain severance and restructuring actions at our RMS business segment. We expect to recover a portion of the severance and restructuring charges through the pricing of our products and services to the U.S. Government and other customers in future periods, which will be included in RMS’ operating results. As of the end of the quarter ended March 31, 2019, we have paid approximately $50 million in severance payments associated with these actions. Income Taxes Our effective income tax rates were 12.4% for the quarter ended March 31, 2019, and 14.9% for the quarter ended March 25, 2018. The rate for the quarter ended March 31, 2019 benefited from additional tax deductions based on proposed tax regulations released on March 4, 2019, which clarified that FMS sales qualify for foreign derived intangible income treatment. Approximately $65 million, or $0.23 per share, of this benefit was recorded discretely because it relates to the prior year. The rates for both periods benefited from tax deductions for dividends paid to our defined contribution plans with an employee stock ownership plan feature, tax deductions for foreign derived intangible income related to commercial sales, tax deductions for employee equity awards, and the research and development tax credit. Sale of Customer Receivables On occasion, our customers may seek deferred payment terms to purchase our products. In connection with these transactions, we may, at our customer’s request, enter into arrangements for the non-recourse sale of customer receivables to unrelated third–party financial institutions. For accounting purposes, these transactions are not discounted and are treated as a sale of receivables as we have no continuing involvement. The sale proceeds from the financial institutions are reflected in our operating cash flows on the statement of cash flows. We sold customer receivables of $104 million during the quarter ended March 31, 2019 and $103 million during the quarter ended March 25, 2018. There were no gains or losses related to sales of these receivables. Short-Term Debt and Commercial Paper As of March 31, 2019, we had $1.3 billion of short-term borrowings due within one year, consisting of $900 million of debt scheduled to mature in November 2019 and $400 million of commercial paper borrowings with a weighted average rate of 2.55%. As of December 31, 2018, we had $1.5 billion of short-term borrowings due within one year, consisting of $900 million of debt scheduled to mature in November 2019 and $600 million of commercial paper borrowings with a weighted average rate of 2.89%. All of our commercial paper borrowings have maturities of up to three months or less from the date of issuance.

RECENT ACCOUNTING PRONOUNCEMENTS	3 Months Ended
RECENT ACCOUNTING PRONOUNCEMENTS	Mar. 31, 2019
Accounting Changes and Error Corrections [Abstract]
RECENT ACCOUNTING PRONOUNCEMENTS	RECENT ACCOUNTING PRONOUNCEMENTS Effective January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842), as amended, which requires lessees to recognize a ROU asset and lease liability on the balance sheet for most lease arrangements and expands disclosures about leasing arrangements for both lessees and lessors, among other items. We adopted ASU 2016-02 using the optional transition method whereby we applied the new lease requirements under ASU 2016-02 through a cumulative-effect adjustment, which after completing our implementation analysis, resulted in no adjustment to our January 1, 2019 beginning retained earnings balance. On January 1, 2019, we recognized approximately $1.0 billion of ROU operating lease assets and approximately $1.1 billion of operating lease liabilities, including noncurrent operating lease liabilities of approximately $830 million as a result of adopting this standard. The difference between ROU operating lease assets and operating lease liabilities was primarily due to previously accrued rent expense relating to periods prior to January 1, 2019. As part of our adoption, we elected all of the available practical expedients with the exception of the practical expedient permitting the use of hindsight when determining the lease term and assessing impairment of ROU assets. The adoption of the standard did not have a material impact on our operating results or cash flows. The comparative periods have not been restated for the adoption of ASU 2016-02. Effective January 1, 2019, we adopted ASU 2017-12, Derivatives and Hedging (Topic 815), which among other things, eliminates the requirement to separately measure and report hedge ineffectiveness. The adoption of this standard did not have a significant impact on our operating results, financial position or cash flows. In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements For Defined Benefit Plans. The new standard modifies the annual disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing and adding certain disclosures for these plans. The guidance is effective for our fiscal year ending December 31, 2020 and requires disclosure changes to be presented on a retrospective basis. The adoption will not have an impact on our operating results, financial position or cash flows. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires companies to record an allowance for expected credit losses over the contractual term of financial assets, including short-term trade receivables and contract assets, and expands disclosure requirements for credit quality of financial assets. We will adopt the new standard effective January 1, 2020. Currently, we do not expect a significant impact to our operating results, financial position or cash flows as a result of adopting this new standard.

RECENT ACCOUNTING PRONOUNCEMENTS (Policies)	3 Months Ended
RECENT ACCOUNTING PRONOUNCEMENTS (Policies)	Mar. 31, 2019
Accounting Changes and Error Corrections [Abstract]
EARNINGS PER COMMON SHARE	We compute basic and diluted earnings per common share by dividing net earnings by the respective weighted average number of common shares outstanding for the periods presented. Our calculation of diluted earnings per common share also includes the dilutive effects for the assumed vesting of outstanding restricted stock units (RSUs) and performance stock units (PSUs) and exercise of outstanding stock options based on the treasury stock method.
INVENTORY COSTS FOR CONTRACTS	Costs incurred to fulfill a customer contract in advance of the contract being awarded are included in inventories as work-in-process if we determine that those costs relate directly to a customer contract or to an anticipated customer contract that we can specifically identify and contract award is probable, the costs generate or enhance resources that will be used in satisfying performance obligations, and the costs are recoverable (referred to as pre-contract costs). Pre-contract costs that are initially capitalized in inventory are generally recognized as cost of sales consistent with the transfer of products and services to the customer upon the receipt of the anticipated contract. All other pre-contract costs, including start-up costs, are expensed as incurred.
LEASES	We evaluate whether our contractual arrangements contain leases at the inception of such arrangements. Specifically, we consider whether we can control the underlying asset and have the right to obtain substantially all of the economic benefits or outputs from the asset. Substantially all of our leases are long-term operating leases with fixed payment terms. We do not have significant financing leases. Our right-of-use (ROU) operating lease assets represent our right to use an underlying asset for the lease term, and our operating lease liabilities represent our obligation to make lease payments. ROU operating lease assets are recorded in other noncurrent assets in our consolidated balance sheet. Operating lease liabilities are recorded in other current liabilities or other noncurrent liabilities in our consolidated balance sheet based on their contractual due dates. Both the ROU operating lease asset and liability are recognized as of the lease commencement date at the present value of the lease payments over the lease term. Most of our leases do not provide an implicit rate that can readily be determined. Therefore, we use a discount rate based on our incremental borrowing rate, which is determined using our credit rating and information available as of the commencement date. ROU operating lease assets include lease payments made at or before the lease commencement date and exclude lease incentives. Our operating lease agreements may include options to extend the lease term or terminate it early. We include options to extend or terminate leases in the ROU operating lease asset and liability when it is reasonably certain we will exercise these options. Operating lease expense is recognized on a straight-line basis over the lease term and is included in cost of sales on our consolidated statement of earnings. We have operating lease arrangements with lease and non-lease components. The non-lease components in our arrangements are not significant when compared to the lease components. For all operating leases, we account for the lease and non-lease components as a single component. Additionally, for certain equipment leases, we apply a portfolio approach to recognize operating lease ROU assets and liabilities. We evaluate ROU assets for impairment consistent with our property, plant and equipment policy disclosure included in our 2018 Form 10‑K.
RECENT ACCOUNTING PRONOUNCEMENTS	Effective January 1, 2019, we adopted ASU 2016-02, Leases (Topic 842), as amended, which requires lessees to recognize a ROU asset and lease liability on the balance sheet for most lease arrangements and expands disclosures about leasing arrangements for both lessees and lessors, among other items. We adopted ASU 2016-02 using the optional transition method whereby we applied the new lease requirements under ASU 2016-02 through a cumulative-effect adjustment, which after completing our implementation analysis, resulted in no adjustment to our January 1, 2019 beginning retained earnings balance. On January 1, 2019, we recognized approximately $1.0 billion of ROU operating lease assets and approximately $1.1 billion of operating lease liabilities, including noncurrent operating lease liabilities of approximately $830 million as a result of adopting this standard. The difference between ROU operating lease assets and operating lease liabilities was primarily due to previously accrued rent expense relating to periods prior to January 1, 2019. As part of our adoption, we elected all of the available practical expedients with the exception of the practical expedient permitting the use of hindsight when determining the lease term and assessing impairment of ROU assets. The adoption of the standard did not have a material impact on our operating results or cash flows. The comparative periods have not been restated for the adoption of ASU 2016-02. Effective January 1, 2019, we adopted ASU 2017-12, Derivatives and Hedging (Topic 815), which among other things, eliminates the requirement to separately measure and report hedge ineffectiveness. The adoption of this standard did not have a significant impact on our operating results, financial position or cash flows. In August 2018, the FASB issued ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Topic 715-20): Disclosure Framework—Changes to the Disclosure Requirements For Defined Benefit Plans. The new standard modifies the annual disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans by removing and adding certain disclosures for these plans. The guidance is effective for our fiscal year ending December 31, 2020 and requires disclosure changes to be presented on a retrospective basis. The adoption will not have an impact on our operating results, financial position or cash flows. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, which requires companies to record an allowance for expected credit losses over the contractual term of financial assets, including short-term trade receivables and contract assets, and expands disclosure requirements for credit quality of financial assets.

EARNINGS PER COMMON SHARE (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Weighted Average Shares Outstanding Used to Compute Earnings Per Common Share

The weighted average number of shares outstanding used to compute earnings per common share were as follows (in millions):



	Quarters Ended
	March 31, 2019	March 25, 2018
Weighted average common shares outstanding for basic computations	282.5	285.5
Weighted average dilutive effect of equity awards	1.8	2.4
Weighted average common shares outstanding for diluted computations	284.3	287.9

INFORMATION ON BUSINESS SEGMENTS (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Summary Of Operating Results and Total Assets For Each Business Segment

Net sales by products and services, contract type, customer, and geographic region were as follows (in millions):



	Quarter Ended March 31, 2019
	Aeronautics		MFC		RMS		Space		Total
Net sales
Products	$	4,796	$	1,916	$	3,059	$	2,199	$	11,970
Services	788		434		703		441		2,366
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by contract type
Fixed-price	$	4,170	$	1,535	$	2,619	$	523	$	8,847
Cost-reimbursable	1,414		815		1,143		2,117		5,489
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by customer
U.S. Government	$	3,435	$	1,633	$	2,675	$	2,236	$	9,979
International ^(a)	2,095		670		995		395		4,155
U.S. commercial and other	54		47		92		9		202
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336
Net sales by geographic region
United States	$	3,489	$	1,680	$	2,767	$	2,245	$	10,181
Asia Pacific	906		122		330		8		1,366
Europe	798		122		198		381		1,499
Middle East	337		413		285		6		1,041
Other	54		13		182		—		249
Total net sales	$	5,584	$	2,350	$	3,762	$	2,640	$	14,336



	Quarter Ended March 25, 2018
	Aeronautics		MFC		RMS		Space		Total
Net sales
Products	$	3,770	$	1,353	$	2,717	$	1,922	$	9,762
Services	628		324		506		415		1,873
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by contract type
Fixed-price	$	3,215	$	1,112	$	2,208	$	400	$	6,935
Cost-reimbursable	1,183		565		1,015		1,937		4,700
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by customer
U.S. Government	$	2,765	$	1,088	$	2,356	$	1,870	$	8,079
International ^(a)	1,577		554		781		456		3,368
U.S. commercial and other	56		35		86		11		188
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635
Net sales by geographic region
United States	$	2,821	$	1,123	$	2,442	$	1,881	$	8,267
Asia Pacific	754		98		324		23		1,199
Europe	508		69		155		426		1,158
Middle East	257		380		171		7		815
Other	58		7		131		—		196
Total net sales	$	4,398	$	1,677	$	3,223	$	2,337	$	11,635


^(a)	International sales include foreign military sales (FMS) contracted through the U.S. Government and direct commercial sales to international governments and other international customers.

Total assets for each of our business segments were as follows (in millions):



	March 31, 2019		December 31, 2018
Assets
Aeronautics	$	9,469	$	8,435
Missiles and Fire Control	5,678		5,017
Rotary and Mission Systems	18,914		18,333
Space	5,792		5,445
Total business segment assets	39,853		37,230
Corporate assets ^(a)	7,831		7,646
Total assets	$	47,684	$	44,876

^(a)

Corporate assets primarily include cash and cash equivalents, deferred income taxes, environmental receivables, and investments held in a separate trust to fund certain of our non-qualified deferred compensation plans.Summary operating results for each of our business segments were as follows (in millions):



	Quarters Ended
	March 31, 2019			March 25, 2018
Net sales
Aeronautics	$	5,584		$	4,398
Missiles and Fire Control	2,350			1,677
Rotary and Mission Systems	3,762			3,223
Space	2,640			2,337
Total net sales	$	14,336		$	11,635
Operating profit
Aeronautics	$	585		$	474
Missiles and Fire Control	417			261
Rotary and Mission Systems	379			311
Space	334			264
Total business segment operating profit	1,715			1,310
Unallocated items
FAS/CAS operating adjustment ^(a)	512			451
Stock-based compensation	(37		)	(38		)
Other, net	93			2
Total unallocated items	568			415
Total consolidated operating profit	$	2,283		$	1,725
Intersegment sales
Aeronautics	$	42		$	25
Missiles and Fire Control	121			95
Rotary and Mission Systems	580			461
Space	68			45
Total intersegment sales	$	811		$	626


^(a)	The FAS/CAS operating adjustment represents the difference between the service cost component of FAS pension expense and total pension costs recoverable on U.S. Government contracts as determined in accordance with CAS.



	Quarters Ended
	March 31, 2019			March 25, 2018
Total FAS expense and CAS costs
FAS pension expense	$	(273	)	$	(356	)
Less: CAS pension cost	641			608
Net FAS/CAS pension adjustment	$	368		$	252

Service and non-service cost reconciliation
FAS pension service cost	$	(129	)	$	(157	)
Less: CAS pension cost	641			608
FAS/CAS operating adjustment	512			451
Non-operating FAS pension cost^(a)	(144		)	(199		)
Net FAS/CAS pension adjustment	$	368		$	252

^(a)

The non-service cost components of net periodic benefit cost relate only to our qualified defined benefit pension plans. In addition to the non service cost components in the table above, we incurred similar costs for our other postretirement benefit plans of $30 million and $17 million for the quarters ended March 31, 2019 and March 25, 2018.

CONTRACT ASSETS AND LIABILITIES (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

Summary of Contract Assets and Liabilities

Contract assets and contract liabilities were as follows (in millions):



	March 31, 2019		December 31, 2018
Contract assets	$	10,497	$	9,472
Contract liabilities	6,796		6,491

INVENTORIES (Tables)

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Schedule of Inventories, Net

Inventories consisted of the following (in millions):



	March 31, 2019		December 31, 2018
Materials, spares and supplies	$	438	$	446
Work-in-process	2,495		2,161
Finished goods	352		390
Total inventories	$	3,285	$	2,997

LEASES (Tables)

3 Months Ended

Mar. 31, 2019

Leases [Abstract]

Future Minimum Lease Commitments

Future minimum lease commitments at March 31, 2019 were as follows (in millions):



	Total		Remainder of 2019		2020		2021		2022		2023		Thereafter
Operating leases	$	1,243	$	234	$	175	$	147	$	117	$	96	$	474
Less: imputed interest	$	182
Total	$	1,061

POSTRETIREMENT BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2019

Retirement Benefits [Abstract]

Schedule of Pretax Net Periodic Benefit Cost

Our pretax net periodic benefit cost related to our qualified defined benefit pension plans and retiree medical and life insurance plans consisted of the following (in millions):



	Quarters Ended
	March 31, 2019			March 25, 2018
Qualified defined benefit pension plans
Service cost	$	129		$	157
Interest cost	452			435
Expected return on plan assets	(575		)	(599		)
Recognized net actuarial losses	351			444
Amortization of prior service credits	(84		)	(81		)
Total net periodic benefit cost	$	273		$	356
Retiree medical and life insurance plans
Service cost	$	4		$	5
Interest cost	24			23
Expected return on plan assets	(28		)	(34		)
Recognized net actuarial losses	1			1
Amortization of prior service costs	10			4
Total net periodic benefit (credit) cost	$	11		$	(1	)

FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Schedule of Assets and Liabilities Measured and Recorded at Fair Value

Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions):



	March 31, 2019						December 31, 2018
	Total		Level 1		Level 2		Total		Level 1		Level 2
Assets
Mutual funds	$	984	$	984	$	—	$	978	$	978	$	—
U.S. Government securities	112		—		112		105		—		105
Other securities	180		65		115		144		28		116
Derivatives	20		—		20		22		—		22
Liabilities
Derivatives	78		—		78		61		—		61
Assets measured at NAV ^(a)
Other commingled funds	19						18

^(a)

Net Asset Value (NAV) is the total value of the fund divided by the number of the fund’s shares outstanding.

STOCKHOLDERS' EQUITY (Tables)

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Schedule of Changes in the Balance of AOCL, Net of Tax

Changes in the balance of AOCL, net of tax, consisted of the following (in millions):



	Postretirement Benefit Plans			Other, net			AOCL
Balance at December 31, 2018	$	(14,254	)	$	(67	)	$	(14,321	)
Other comprehensive income before reclassifications	—			(5		)	(5		)
Amounts reclassified from AOCL
Recognition of net actuarial losses ^(a)	287			—			287
Amortization of net prior service credits ^(a)	(60		)	—			(60		)
Other	—			5			5
Total reclassified from AOCL	227			5			232
Total other comprehensive income	227			—			227
Balance at March 31, 2019	$	(14,027	)	$	(67	)	$	(14,094	)

Balance at December 31, 2017	$	(12,559	)	$	20		$	(12,539	)
Other comprehensive income before reclassifications	—			55			55
Amounts reclassified from AOCL
Recognition of net actuarial losses ^(a)	364			—			364
Amortization of net prior service credits ^(a)	(64		)	—			(64		)
Other	—			3			3
Total reclassified from AOCL	300			3			303
Total other comprehensive income	300			58			358
Reclassification of income tax effects from tax reform^(b)	(2,396		)	(12		)	(2,408		)
Balance at March 25, 2018	$	(14,655	)	$	66		$	(14,589	)


^(a)	Reclassifications from AOCL related to our postretirement benefit plans were recorded as a component of net periodic benefit cost for each period presented (see “Note 7 – Postretirement Benefit Plans”).

^(b)

EARNINGS PER COMMON SHARE - Schedule of Weighted Average Shares Outstanding Used to Compute Earnings Per Common Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Earnings Per Share [Abstract]
Weighted average common shares outstanding for basic computations (in shares)	282.5	285.5
Weighted average dilutive effect of equity awards (in shares)	1.8	2.4
Weighted average common shares outstanding for diluted computations (in shares)	284.3	287.9

EARNINGS PER COMMON SHARE - Narrative (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Earnings Per Share [Abstract]
Significant anti-dilutive equity awards (in shares)	0.0	0.0

INFORMATION ON BUSINESS SEGMENTS - Narrative (Details) - segment	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Segment Reporting [Abstract]
Number of business segments	4
Product Concentration Risk \| Sales Revenue, Net \| F-35 program \| Aeronautics
Segment Reporting Information [Line Items]
Net sales for the F-35 program representing total consolidated net sales (as a percent)	26.00%	24.00%

INFORMATION ON BUSINESS SEGMENTS - Summary of Operating Results For Each Business Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Net sales
Total net sales	$ 14,336	$ 11,635
Operating profit
Total operating profit	2,283	1,725
Aeronautics
Net sales
Total net sales	5,584	4,398
Missiles and Fire Control
Net sales
Total net sales	2,350	1,677
Rotary and Mission Systems
Net sales
Total net sales	3,762	3,223
Space
Net sales
Total net sales	2,640	2,337
Business segments
Net sales
Total net sales	14,336	11,635
Operating profit
Total operating profit	1,715	1,310
Business segments \| Aeronautics
Net sales
Total net sales	5,584	4,398
Operating profit
Total operating profit	585	474
Business segments \| Missiles and Fire Control
Net sales
Total net sales	2,350	1,677
Operating profit
Total operating profit	417	261
Business segments \| Rotary and Mission Systems
Net sales
Total net sales	3,762	3,223
Operating profit
Total operating profit	379	311
Business segments \| Space
Net sales
Total net sales	2,640	2,337
Operating profit
Total operating profit	334	264
Segment reconciling items
Unallocated items
FAS/CAS operating adjustment	512	451
Stock-based compensation	(37)	(38)
Other, net	93	2
Total unallocated items	568	415
Intersegment sales
Net sales
Total net sales	811	626
Intersegment sales \| Aeronautics
Net sales
Total net sales	42	25
Intersegment sales \| Missiles and Fire Control
Net sales
Total net sales	121	95
Intersegment sales \| Rotary and Mission Systems
Net sales
Total net sales	580	461
Intersegment sales \| Space
Net sales
Total net sales	$ 68	$ 45

INFORMATION ON BUSINESS SEGMENTS - FAS/CAS Pension Adjustment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Segment Reporting Information [Line Items]
Non-operating FAS pension cost	$ (144)	$ (199)
Net FAS/CAS pension adjustment	368	252
Segment reconciling items
Segment Reporting Information [Line Items]
Less: CAS pension cost	641	608
FAS pension service cost	(129)	(157)
FAS/CAS operating adjustment	512	451
Qualified defined benefit pension plans
Segment Reporting Information [Line Items]
FAS pension expense/service cost	273	356
FAS pension service cost	(129)	(157)
Qualified defined benefit pension plans \| Qualified Plan
Segment Reporting Information [Line Items]
FAS pension expense/service cost	(273)	(356)
Non-operating FAS pension cost	$ (30)	$ (17)

INFORMATION ON BUSINESS SEGMENTS - Income Statement Information For Each Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Net sales
Net sales	$ 14,336	$ 11,635
Aeronautics
Net sales
Net sales	5,584	4,398
MFC
Net sales
Net sales	2,350	1,677
RMS
Net sales
Net sales	3,762	3,223
Space
Net sales
Net sales	2,640	2,337
United States
Net sales
Net sales	10,181	8,267
United States \| Aeronautics
Net sales
Net sales	3,489	2,821
United States \| MFC
Net sales
Net sales	1,680	1,123
United States \| RMS
Net sales
Net sales	2,767	2,442
United States \| Space
Net sales
Net sales	2,245	1,881
Asia Pacific
Net sales
Net sales	1,366	1,199
Asia Pacific \| Aeronautics
Net sales
Net sales	906	754
Asia Pacific \| MFC
Net sales
Net sales	122	98
Asia Pacific \| RMS
Net sales
Net sales	330	324
Asia Pacific \| Space
Net sales
Net sales	8	23
Europe
Net sales
Net sales	1,499	1,158
Europe \| Aeronautics
Net sales
Net sales	798	508
Europe \| MFC
Net sales
Net sales	122	69
Europe \| RMS
Net sales
Net sales	198	155
Europe \| Space
Net sales
Net sales	381	426
Middle East
Net sales
Net sales	1,041	815
Middle East \| Aeronautics
Net sales
Net sales	337	257
Middle East \| MFC
Net sales
Net sales	413	380
Middle East \| RMS
Net sales
Net sales	285	171
Middle East \| Space
Net sales
Net sales	6	7
Other
Net sales
Net sales	249	196
Other \| Aeronautics
Net sales
Net sales	54	58
Other \| MFC
Net sales
Net sales	13	7
Other \| RMS
Net sales
Net sales	182	131
Other \| Space
Net sales
Net sales	0	0
U.S. Government
Net sales
Net sales	9,979	8,079
U.S. Government \| Aeronautics
Net sales
Net sales	3,435	2,765
U.S. Government \| MFC
Net sales
Net sales	1,633	1,088
U.S. Government \| RMS
Net sales
Net sales	2,675	2,356
U.S. Government \| Space
Net sales
Net sales	2,236	1,870
International
Net sales
Net sales	4,155	3,368
International \| Aeronautics
Net sales
Net sales	2,095	1,577
International \| MFC
Net sales
Net sales	670	554
International \| RMS
Net sales
Net sales	995	781
International \| Space
Net sales
Net sales	395	456
U.S. commercial and other
Net sales
Net sales	202	188
U.S. commercial and other \| Aeronautics
Net sales
Net sales	54	56
U.S. commercial and other \| MFC
Net sales
Net sales	47	35
U.S. commercial and other \| RMS
Net sales
Net sales	92	86
U.S. commercial and other \| Space
Net sales
Net sales	9	11
Fixed-price
Net sales
Net sales	8,847	6,935
Fixed-price \| Aeronautics
Net sales
Net sales	4,170	3,215
Fixed-price \| MFC
Net sales
Net sales	1,535	1,112
Fixed-price \| RMS
Net sales
Net sales	2,619	2,208
Fixed-price \| Space
Net sales
Net sales	523	400
Cost-reimbursable
Net sales
Net sales	5,489	4,700
Cost-reimbursable \| Aeronautics
Net sales
Net sales	1,414	1,183
Cost-reimbursable \| MFC
Net sales
Net sales	815	565
Cost-reimbursable \| RMS
Net sales
Net sales	1,143	1,015
Cost-reimbursable \| Space
Net sales
Net sales	2,117	1,937
Products
Net sales
Net sales	11,970	9,762
Products \| Aeronautics
Net sales
Net sales	4,796	3,770
Products \| MFC
Net sales
Net sales	1,916	1,353
Products \| RMS
Net sales
Net sales	3,059	2,717
Products \| Space
Net sales
Net sales	2,199	1,922
Services
Net sales
Net sales	2,366	1,873
Services \| Aeronautics
Net sales
Net sales	788	628
Services \| MFC
Net sales
Net sales	434	324
Services \| RMS
Net sales
Net sales	703	506
Services \| Space
Net sales
Net sales	$ 441	$ 415

INFORMATION ON BUSINESS SEGMENTS - Total Assets For Each Business Segment (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total assets	$ 47,684	$ 44,876
Business segments
Segment Reporting Information [Line Items]
Total assets	39,853	37,230
Business segments \| Aeronautics
Segment Reporting Information [Line Items]
Total assets	9,469	8,435
Business segments \| Missiles and Fire Control
Segment Reporting Information [Line Items]
Total assets	5,678	5,017
Business segments \| Rotary and Mission Systems
Segment Reporting Information [Line Items]
Total assets	18,914	18,333
Business segments \| Space
Segment Reporting Information [Line Items]
Total assets	5,792	5,445
Corporate
Segment Reporting Information [Line Items]
Total assets	$ 7,831	$ 7,646

CONTRACT ASSETS AND LIABILITIES (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Contract assets	$ 10,497	$ 9,472
Contract liabilities	$ 6,796	$ 6,491

CONTRACT ASSETS AND LIABILITIES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Revenue from Contract with Customer [Abstract]
Increase in contract assets	$ 1,025	$ 1,413
Impairment loss	0	0
Increase in contract liabilities	305	(478)
Liability, revenue recognized	$ 1,800	$ 1,900

INVENTORIES (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Materials, spares and supplies	$ 438	$ 446
Work-in-process	2,495	2,161
Finished goods	352	390
Total inventories	3,285	2,997
Capitalized contract cost	$ 468	$ 443

LEASES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
LEASES - Narrative (Details) - USD ($) $ in Millions	Mar. 31, 2019	Mar. 25, 2018
Leases [Abstract]
Operating lease, right-of-use asset	$ 969
Operating lease, liability	1,061
Operating lease, liability, noncurrent	$ 812
Weighted average remaining lease term	9 years 3 months 18 days
Weighted average discount rate	3.40%
Operating lease cost	$ 59	$ 60
Cash payments	$ 57

LEASES - Future Minimum Lease Commitments (Details) $ in Millions	Mar. 31, 2019 USD ($)
Leases [Abstract]
Remainder of 2019	$ 234
2020	175
2021	147
2022	117
2023	96
Thereafter	474
Total	1,243
Less: imputed interest	182
Total, less imputed interest	$ 1,061

POSTRETIREMENT BENEFIT PLANS - Schedule of Pretax Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Qualified defined benefit pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 129	$ 157
Interest cost	452	435
Expected return on plan assets	(575)	(599)
Recognized net actuarial losses	351	444
Amortization of prior service credits	(84)	(81)
Total net periodic benefit cost	273	356
Retiree medical and life insurance plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	4	5
Interest cost	24	23
Expected return on plan assets	(28)	(34)
Recognized net actuarial losses	1	1
Amortization of prior service credits	10	4
Total net periodic benefit cost	$ 11	$ (1)

POSTRETIREMENT BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Defined Benefit Plan Disclosure [Line Items]
Recognition of previously deferred postretirement benefit plan amounts, before tax	$ 289	$ 382
Recognition of previously deferred postretirement benefit plan amounts, net of tax	227	300
Retiree medical and life insurance plans
Defined Benefit Plan Disclosure [Line Items]
Recognition of previously deferred postretirement benefit plan amounts, before tax	11	14
Qualified defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Material contributions to qualified defined benefit pension plans	$ 0	$ 1,500

LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions		1 Months Ended	3 Months Ended	12 Months Ended
LEGAL PROCEEDINGS AND CONTINGENCIES (Details) $ in Millions	Aug. 16, 2016 USD ($)	Dec. 31, 2014	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($) subsidiary	Dec. 31, 2016	May 31, 2017 lawsuit	Apr. 24, 2009 USD ($)
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 52
Liabilities recorded relative to environmental matters			830	$ 864
Environmental costs eligible for future recovery			$ 721	750
Period over which costs and recovery of costs is projected			20 years
Outstanding letters of credit, surety bonds, and third-party guarantees			$ 3,400	3,600
Third-party guarantees			$ 905	$ 850
Guarantees of contractual performance of joint ventures (as a percent)			66.00%	65.00%
Leidos Holdings, Inc.
Loss Contingencies [Line Items]
Reserve transferred	$ 38
Indemnification percent, up to maximum reserve					100.00%
Maximum reserve				$ 64
Indemnification percent in excess of maximum reserve					50.00%
N.Y. Metropolitan Transportation Authority
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 190
Contract value							$ 323
Contract payments received to date			241
Claims for monetary damages against the plaintiff			$ 95
Period of bench trial		35 days
Sikorsky Aircraft Corporation
Loss Contingencies [Line Items]
Number of pending claims \| lawsuit						2
Number of entities involved in litigation \| subsidiary				2

FAIR VALUE MEASUREMENTS - Schedule of Assets and Liabilities Measured and Recorded at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Assets
Derivatives	$ 20	$ 22
Liabilities
Derivatives	78	61
Mutual funds
Assets
Fair Value of Investments	984	978
U.S. Government securities
Assets
Fair Value of Investments	112	105
Other securities
Assets
Fair Value of Investments	180	144
Level 1
Assets
Derivatives	0	0
Liabilities
Derivatives	0	0
Level 1 \| Mutual funds
Assets
Fair Value of Investments	984	978
Level 1 \| U.S. Government securities
Assets
Fair Value of Investments	0	0
Level 1 \| Other securities
Assets
Fair Value of Investments	65	28
Level 2
Assets
Derivatives	20	22
Liabilities
Derivatives	78	61
Level 2 \| Mutual funds
Assets
Fair Value of Investments	0	0
Level 2 \| U.S. Government securities
Assets
Fair Value of Investments	112	105
Level 2 \| Other securities
Assets
Fair Value of Investments	115	116
NAV \| Other commingled funds
Liabilities
Assets measured at NAV	$ 19	$ 18

FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($) $ in Billions	Mar. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Outstanding principal amount	$ 15.1	$ 15.3
Unamortized discounts and issuance costs	1.2	1.2
Interest rate swaps \| Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of outstanding interest rate swaps	1.3	1.3
Foreign currency hedges \| Designated as hedges
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate notional amount of outstanding interest rate swaps	3.4	3.5
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated fair value of outstanding debt	$ 16.3	$ 15.4

STOCKHOLDERS' EQUITY - Repurchases of Common Stock (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018	Dec. 31, 2018
Shareholders Equity [Line Items]
Common stock repurchased (in shares)	1.0
Reduction to stockholders' equity due to repurchases of common stock	$ 284	$ 300
Total remaining authorization for future common share repurchases	$ 2,700
Par value of shares repurchased (in dollars per share)	$ 1		$ 1
Additional paid-in capital after reduction	$ 0		$ 0
Reduction to retained earnings
Shareholders Equity [Line Items]
Reduction to stockholders' equity due to repurchases of common stock	$ 237	$ 274

STOCKHOLDERS' EQUITY - Dividends (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Equity [Abstract]
Cash dividends declared, amount	$ 623	$ 573
Cash dividends declared (in dollars per share)	$ 2.20	$ 2.00

STOCKHOLDERS' EQUITY - Restricted Stock Unit Grants (Narrative) (Details) - RSUs shares in Millions	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs granted to certain employees (in shares) \| shares	0.6
Grant date fair value per RSU (in dollars per share) \| $ / shares	$ 303.60
Award vesting period	3 years

STOCKHOLDERS' EQUITY - Schedule of Changes in the Balance of AOCL, Net of Tax (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	$ 1,449	$ (776)
Other comprehensive income before reclassifications	(5)	55
Total reclassified from AOCL	232	303
Other comprehensive income, net of tax	227	358
Ending Balance	2,522	(111)
Postretirement Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(14,254)	(12,559)
Other comprehensive income before reclassifications	0	0
Total reclassified from AOCL	227	300
Other comprehensive income, net of tax	227	300
Reclassification of income tax effects from tax reform		(2,396)
Ending Balance	(14,027)	(14,655)
Other, net
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(67)	20
Other comprehensive income before reclassifications	(5)	55
Total reclassified from AOCL	5	3
Other comprehensive income, net of tax	0	58
Reclassification of income tax effects from tax reform		(12)
Ending Balance	(67)	66
AOCL
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Beginning Balance	(14,321)	(12,539)
Other comprehensive income, net of tax	227	358
Reclassification of income tax effects from tax reform		(2,408)
Ending Balance	(14,094)	(14,589)
Recognition of net actuarial losses
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Total reclassified from AOCL	287	364
Amortization of net prior service credits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Total reclassified from AOCL	(60)	(64)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax
Total reclassified from AOCL	$ 5	$ 3

OTHER - Changes in Estimates and Backlog (Details) $ / shares in Units, $ in Millions	1 Months Ended		3 Months Ended
	Apr. 30, 2019 satellite	Feb. 28, 2019 satellite	Mar. 31, 2019 USD ($) satellite program $ / shares	Mar. 25, 2018 USD ($) $ / shares
Change in Accounting Estimate [Line Items]
Performance obligation satisfied in previous period			$ 670	$ 415
Number of satellites launched or to be launched \| satellite		1	3
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Increase in operating profit due to profit rate adjustments			$ 565	420
Increase in net earnings due to profit rate adjustments			$ 446	$ 332
Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) \| $ / shares			$ 1.57	$ 1.15
Ground Based Radar
Change in Accounting Estimate [Line Items]
Contract loss incurred, gross			$ 50
Contract loss incurred, after tax			$ 38
Contract loss incurred, earnings per share (in dollars per share) \| $ / shares			$ 0.13
Cumulative losses on development			$ 195
LM 2100 Project
Change in Accounting Estimate [Line Items]
Contract loss incurred, gross			20
Contract loss incurred, after tax			$ 15
Contract loss incurred, earnings per share (in dollars per share) \| $ / shares			$ 0.05
Cumulative losses on development			$ 410
Warrior Capability Sustainment Program
Change in Accounting Estimate [Line Items]
Cumulative losses on development			$ 140
Space
Change in Accounting Estimate [Line Items]
Number of commercial satellite programs with performance issues \| program			2
Subsequent Event
Change in Accounting Estimate [Line Items]
Number of satellites launched or to be launched \| satellite	1

OTHER - Backlog (Details) $ in Billions	Mar. 31, 2019 USD ($)
Accounting Policies [Abstract]
Remaining performance obligation	$ 133.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	37.00%
Expected time of satisfaction	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, percentage	28.00%
Expected time of satisfaction	12 months

OTHER - Severance and Restructuring Charges (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Jun. 24, 2018
RMS
Restructuring Cost and Reserve [Line Items]
Severance and restructuring charges		$ 96
Severance and restructuring charges, net of tax		$ 76
Severance and restructuring charges (in dollars per share)		$ 0.26
Operations Consolidation
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	$ 50

OTHER - Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Accounting Policies [Abstract]
Effective income tax rate	12.40%	14.90%
Prior year income taxes benefit	$ 65
Prior year income taxes adjustment (in dollars per share)	$ 0.23

OTHER - Sale of Customer Receivables (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 25, 2018
Accounting Policies [Abstract]
Customer receivables sold	$ 104,000,000	$ 103,000,000
Gains or losses related to sales of receivables	$ 0	$ 0

OTHER - Short-Term Debt and Commercial Paper (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Short-term Debt [Line Items]
Current maturities of long-term debt	$ 1,300	$ 1,500
Commercial paper	400	600
Four Point Two Five Percent Notes Due Two Thousand Nineteen
Short-term Debt [Line Items]
Long-term debt, gross	$ 900	$ 900
Commercial Paper
Short-term Debt [Line Items]
Short-term debt, weighted average interest rate, at point in time	2.55%	2.89%

RECENT ACCOUNTING PRONOUNCEMENTS (Details) - USD ($) $ in Millions	Mar. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset	$ 969
Operating lease, liability	1,061
Operating lease, liability, noncurrent	$ 812
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, right-of-use asset		$ 1,000
Operating lease, liability		1,100
Operating lease, liability, noncurrent		$ 830