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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 |  |  |  |  |

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