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Organization and Significant Accounting Policies - Additional Information (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Oct. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2024
USD ($)
segment
contract
$ / shares
Dec. 31, 2023
USD ($)
$ / shares
Dec. 31, 2022
USD ($)
$ / shares
Accounting Policies [Abstract]            
Number of business segments | segment       4    
Number of contract types | contract       3    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Ending backlog   $ 176,000   $ 176,000    
Significant Accounting Policies [Line Items]            
Goodwill   11,067   11,067 $ 10,799 $ 10,780
Performance obligation satisfied in previous period       1,200 1,600 2,000
Contract liabilities   9,795   9,795 9,190  
Independent research and development costs charged to cost of sales       $ 1,600 1,500 1,700
Number of years over which equity awards vest       1 year    
Capitalized internal-use software, net   1,900   $ 1,900 1,400  
Capitalized internal-use software accumulated amortization   3,100   3,100 2,800  
Capitalized internal-use software amortization       346 263 253
Carrying amount of investments held in Lockheed martin venture fund   600   600 581  
Realized (loss) gain reflected in other non-operating income       22 (64) (114)
Realized (loss) gain recognized for changes in fair value, net of tax       $ 17 $ (48) $ (86)
Realized (loss) gain, net of tax, amount per share ( in dollars per share) | $ / shares       $ 0.07 $ (0.19) $ (0.33)
Equity method investments   $ 654   $ 654 $ 701  
Net earnings from equity method investments       $ 56 40 $ 114
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]   Other noncurrent assets   Other noncurrent assets    
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]   Other current liabilities   Other current liabilities    
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]   Other noncurrent liabilities   Other noncurrent liabilities    
Environmental costs eligible for future recovery       20 years    
Derivative Asset, Statement of Financial Position [Extensible Enumeration]   Other current assets, Other noncurrent assets   Other current assets, Other noncurrent assets    
Derivative Liability, Statement of Financial Position [Extensible Enumeration]   Other current liabilities, Other noncurrent liabilities   Other current liabilities, Other noncurrent liabilities    
Canadian Government            
Significant Accounting Policies [Line Items]            
Contract asset   $ 955   $ 955    
Minimum            
Significant Accounting Policies [Line Items]            
Number of years over which equity awards vest       1 year    
Acquired finite-lived intangible assets are amortized   3 years   3 years    
Minimum | Buildings            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   10 years   10 years    
Minimum | Machinery and equipment            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   5 years   5 years    
Minimum | Capitalized Software            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   2 years   2 years    
Maximum            
Significant Accounting Policies [Line Items]            
Number of years over which equity awards vest       3 years    
Acquired finite-lived intangible assets are amortized   20 years   20 years    
Maximum | Buildings            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   40 years   40 years    
Maximum | Machinery and equipment            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   15 years   15 years    
Maximum | Capitalized Software            
Significant Accounting Policies [Line Items]            
Property, plant and equipment, estimated life   15 years   15 years    
Restricted Stock Units and Performance Stock Units            
Significant Accounting Policies [Line Items]            
Number of years over which equity awards vest       3 years    
Aeronautics            
Significant Accounting Policies [Line Items]            
Goodwill   $ 196   $ 196 196 196
MFC            
Significant Accounting Policies [Line Items]            
Goodwill   2,085   2,085 2,086 2,083
Reach-forward loss     $ 100 1,400    
Operating profit favorable profit adjustments       155    
Cumulative losses on development   1,460   1,460    
Additional operating profit reach-forward loss   1,310   1,310    
Additional options of potential loss       1,410    
Contract liabilities   1,360   1,360    
Space            
Significant Accounting Policies [Line Items]            
Net earnings from equity method investments       45 20 100
Classified Fixed-Price Incentive Fee Contract            
Significant Accounting Policies [Line Items]            
Reach-forward loss   410   555    
Cumulative losses on development   825   825    
Classified Fixed-Price Incentive Fee Contract | Aeronautics            
Significant Accounting Policies [Line Items]            
Reach-forward loss       555    
Canadian Maritime Helicopter Program            
Significant Accounting Policies [Line Items]            
Reach-forward loss         100  
Operating profit favorable profit adjustments         65  
Contracts Accounted for under Percentage of Completion            
Significant Accounting Policies [Line Items]            
Increase (decrease) in operating profit due to profit rate adjustments       (180) 1,600 1,800
Increase (decrease) in net earnings due to profit rate adjustments       $ (142) $ 1,300 $ 1,400
Increase (decrease) in diluted earnings per common share due to profit rate adjustments (in dollars per share) | $ / shares       $ 0.59 $ 4.98 $ 5.40
Cumulative losses on development   $ 100   $ 100    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Period One            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Revenue, remaining performance obligation, percentage   35.00%   35.00%    
Expected time of satisfaction   12 months   12 months    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Period Two            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]            
Revenue, remaining performance obligation, percentage   60.00%   60.00%    
Expected time of satisfaction   24 months   24 months    
Terran Orbital            
Significant Accounting Policies [Line Items]            
Total transaction value $ 314          
Purchase price 83          
Net of cash acquired 231          
Goodwill $ 298