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Organization and Significant Accounting Policies - Additional Information (Detail) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2020 USD ($) | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2022 USD ($) contract segment $ / shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2020 USD ($) $ / shares
Accounting Policies [Abstract] |  |  |  |  |
Number of business segments | segment |  |  | 4 |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Number of contract types | contract |  |  | 3 |  |
Ending backlog |  | $ 150,000 | $ 150,000 |  |
Performance obligation satisfied in previous period |  |  | 2,000 | $ 2,200 | $ 2,000
Independent research and development costs charged to cost of sales |  |  | 1,700 | 1,500 | 1,300
Capitalized internal-use software, net |  | 919 | 919 | 777 |
Capitalized internal-use software accumulated amortization |  | 2,600 | 2,600 | 2,300 |
Capitalized internal-use software amortization |  |  | 253 | 175 | 166
Carrying amount of investments held in Lockheed martin venture fund |  | 589 | 589 | 577 |
Realized gain reflected in other non-operating income |  |  | 114 | 265 |
Realized gain recognized for changes in fair value, net of tax |  |  | $ 86 | $ 199 |
Net of tax, amount per share ( in dollars per share) | $ / shares |  |  | $ 0.33 | $ 0.72 |
Total equity method investments |  | $ 685 | $ 685 | $ 689 |
Net earnings from equity method investments |  |  | 114 | 97 | 163
Equity method investee impairment |  |  | $ 0 | 0 | 128
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] |  | Other noncurrent assets | Other noncurrent assets |  |
Severance and other charges |  | $ 100 | $ 100 | 36 | 27
Severance and restructuring costs, after-tax |  | $ 79 |  | $ 28 | $ 21
Severance and restructuring costs, per share, after-tax (in dollars per share) | $ / shares |  | $ 0.31 |  | $ 0.10 | $ 0.08
Derivative Liability, Statement of Financial Position [Extensible Enumeration] |  | Other noncurrent liabilities | Other noncurrent liabilities |  |
Restricted Stock Units and Performance Stock Units |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Number of years over which equity awards vest |  |  | 3 years |  |
Atomic Weapons Establishment |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
AWE generated sales |  |  |  | $ 885 | $ 1,400
Operating profit |  |  |  | 18 | 35
AMMROC |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Total equity method investments | $ 307 |  |  |  |
Proceeds from sale of equity method investments | 307 |  |  |  |
Equity method investee impairment | $ 128 |  |  |  | 128
Equity method investee impairment, net of tax |  |  |  |  | $ 96
Equity method investee impairment (in dollars per share) | $ / shares |  |  |  |  | $ 0.34
Space Systems |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Net earnings from equity method investments |  |  | $ 100 | 65 | $ 135
Minimum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  | 5 years |  |
Minimum | Customer programs |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  | 9 years |  |
Minimum | Buildings |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 10 years |  |
Minimum | Machinery and equipment |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 5 years |  |
Minimum | Capitalized Software |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 2 years |  |
Maximum |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  | 20 years |  |
Maximum | Customer programs |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Acquired finite-lived intangible assets are amortized |  |  | 20 years |  |
Maximum | Buildings |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 40 years |  |
Maximum | Machinery and equipment |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 15 years |  |
Maximum | Capitalized Software |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Property, plant and equipment, estimated life |  |  | 15 years |  |
Classified Fixed-Price Incentive Fee Contract | Aeronautics |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Performance growth costs |  | $ 20 | $ 270 |  |
Classified Fixed-Price Incentive Fee Contract | RMS |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Cumulative losses on development |  | $ 280 | $ 280 |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, percentage |  | 37.00% | 37.00% |  |
Expected time of satisfaction |  | 12 months | 12 months |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 |  |  |  |  |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, percentage |  | 61.00% | 61.00% |  |
Expected time of satisfaction |  | 24 months | 24 months |  |
Contracts Accounted for under Percentage of Completion |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Increase in operating profit due to profit rate adjustments |  |  | $ 1,800 | 2,000 | 1,800
Increase in net earnings due to profit rate adjustments |  |  | $ 1,400 | $ 1,600 | $ 1,500
Increase in diluted earnings per common share due to profit rate (in dollars per share) | $ / shares |  |  | $ 5.40 | $ 5.81 | $ 5.33

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