v3.19.3
Cover Page - shares
9 Months Ended
Sep. 29, 2019
Oct. 18, 2019
Cover page.    
Document Type 10-Q  
Document Period End Date Sep. 29, 2019  
Entity File Number 1-11437  
Entity Registrant Name LOCKHEED MARTIN CORPORATION  
Entity Address, State or Province MD  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 52-1893632  
Entity Address, Address Line One 6801 Rockledge Drive,  
Entity Address, City or Town Bethesda,  
Entity Address, Postal Zip Code 20817  
City Area Code 301  
Local Phone Number 897-6000  
Title of 12(b) Security Common Stock, $1 par value  
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 Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   282,071,418
Entity Shell Company false  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Security Exchange Name NYSE  
Document Quarterly Report true  
Document Transition Report false