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Net cash used for financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Table] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Cash dividends declared Dividends, Common Stock, Cash Amendment Flag Amendment Flag Estimated fair value of outstanding debt Long-Term Debt, Fair Value Entity Registrant Name Entity Registrant Name Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Gross profit Gross Profit Fair Value as of Grant Date Award Grant Date Fair Value Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Geographical [Domain] Geographical [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Aggregate principal amount Debt Instrument, Face Amount Entity Address, Postal Zip Code Entity Address, Postal Zip Code Interest Rate Swaps Interest Rate Swap [Member] Other securities Other securities [Member] Other securities [Member] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] Common stock, $1 par value per share Common Stock, Value, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Contracts Accounted for under Percentage of Completion Contracts Accounted for under Percentage of Completion [Member] Litigation Status [Axis] Litigation Status [Axis] Other, net Payments for (Proceeds from) Other Investing Activities 4.50% due 2029 Senior Notes Due 2029, 4.50% [Member] Senior Notes Due 2029, 4.50% Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Cumulative gain on development Estimated Cumulative Losses Estimated cumulative losses, including reserves, recorded since inception. Finished goods Inventory, Finished Goods, Gross Classified Fixed-Price Incentive Fee Contract Classified Fixed-Price Incentive Fee Contract [Member] Classified Fixed-Price Incentive Fee Contract Basic (in dollars per share) Earnings Per Share, Basic Reach-forward loss Operating Profit Reach-Forward Loss Operating Profit Reach-Forward Loss Accounts payable Increase (Decrease) in Accounts Payable Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Armed Services Board of Contract Appeals Armed Services Board of Contract Appeals [Member] Armed Services Board of Contract Appeals Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Dividends Payable [Line Items] Dividends Payable [Line Items] Designated as Hedges Designated as Hedging Instrument [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Total assets Total assets Assets Total cost of sales Cost of Goods and Services Sold Other noncurrent liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] FAIR VALUE MEASUREMENTS Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] 4.80% due 2034 Senior Notes Due 2034, 4.80% [Member] Senior Notes Due 2034, 4.80% Increase in diluted earnings per common share due to profit rate adjustments (in dollars per share) Increase (Decrease) In Operating Income (Loss) Per Share Diluted, Net Of Tax Increase (decrease) in diluted earnings per share due to favorable/unfavorable profit rate adjustments. Termination Date Trading Arrangement Termination Date Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total net sales Total net sales Net sales Revenues Revenue, Remaining Performance Obligation, Expected Timing Of Satisfaction, Period [Domain] Revenue, Remaining Performance Obligation, Expected Timing Of Satisfaction, Period [Domain] Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period Axis [Domain] Entity Address, City or Town Entity Address, City or Town Debt Instrument [Axis] Debt Instrument [Axis] Net earnings Net earnings Net Income (Loss) Net Income (Loss) Attributable to Parent Other income, net Other Operating Income (Expense), Net Trading Arrangement: Trading Arrangement [Axis] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Business Acquisition [Axis] Business Acquisition [Axis] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Entity File Number Entity File Number International International [Member] International [Member] CONTRACT ASSETS AND LIABILITIES Revenue from Contract with Customer [Text Block] Document Fiscal Year Focus Document Fiscal Year Focus Income Statement [Abstract] Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Product Concentration Risk Product Concentration Risk [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Amortization of net actuarial losses Accumulated Defined Benefits Plans Adjustment, Net Actuarial Loss Attributable To Parent [Member] Accumulated Defined Benefits Plans Adjustment, Net Actuarial Loss Attributable To Parent [Member] Asset Class [Axis] Asset Class [Axis] Insider Trading Arrangements [Line Items] Contract assets Contract with Customer, Asset, after Allowance for Credit Loss Unallocated items Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Accelerated Share Repurchase Agreement (ASR) Accelerated Share Repurchase Agreement [Member] Accelerated Share Repurchase Agreement [Member] Credit (cost) recognition of previously deferred postretirement benefit plan amounts, before tax Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Non-service FAS pension/retiree medical and life income Defined Benefit Plan, Other Cost (Credit) Total cost of sales Cost of Revenue Liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Adjustment to Compensation: Adjustment to Compensation [Axis] Foreign Currency Hedges Foreign Exchange Contract [Member] Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Liabilities Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract] Litigation Case [Domain] Litigation Case [Domain] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Customer [Domain] Customer [Domain] Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Retained Earnings Retained Earnings [Member] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Litigation Status [Domain] Litigation Status [Domain] Weighted average common shares outstanding for basic computations (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Sales Revenue, Net Revenue Benchmark [Member] Entity Filer Category Entity Filer Category Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Cost of sales Cost of Revenue [Abstract] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Company Selected Measure Name Company Selected Measure Name