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Summary of Significant Accounting Policies - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($) segment | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Schedule of Accounting Policies [Line Items] |  |  |
Number of reportable segments | segment | 3 |  |
Reinsurance revenues | $ 110 | $ 163 | $ 129
Reinsurance costs | 123 | 181 | 134
Research and development expense, net | 3,812 | 3,377 | 2,852
Accounts payable | 11,364 | 11,964 |
Goodwill | 8,084 | 8,093 | 8,057
Defense, Space & Security |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Goodwill | 3,218 | 3,235 | 3,224
Defense, Space & Security | Military Aircraft |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Goodwill | 1,295 |  |
Commercial Airplanes |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Goodwill | $ 1,328 | 1,319 | 1,316
Capitalized Internal Use Software |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 5 years |  |
Minimum | Developed technology |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 4 years |  |
Minimum | Product know-how |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 6 years |  |
Minimum | Customer base |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 3 years |  |
Minimum | Distribution rights |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 3 years |  |
Minimum | Other Intangible Assets |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 1 year |  |
Minimum | Defense, Space & Security |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Standard warranty term | 6 months |  |
Minimum | Commercial Airplanes |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Standard warranty term | 3 years |  |
Minimum | Land, Buildings and Improvements |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 10 years |  |
Minimum | Machinery and equipment |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 4 years |  |
Maximum | Developed technology |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 14 years |  |
Maximum | Product know-how |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 30 years |  |
Maximum | Customer base |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 17 years |  |
Maximum | Distribution rights |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 27 years |  |
Maximum | Other Intangible Assets |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Finite-lived acquired intangible assets, useful lives (in years) | 32 years |  |
Maximum | Defense, Space & Security |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Standard warranty term | 2 years |  |
Maximum | Commercial Airplanes |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Standard warranty term | 4 years |  |
Maximum | Land, Buildings and Improvements |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 40 years |  |
Maximum | Machinery and equipment |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 20 years |  |
Maximum | 7372 Services, Prepackaged Software |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Property, plant and equipment, estimated useful lives (in years) | 10 years |  |
Bank Overdrafts |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Accounts payable | $ 110 | 117 |
Bid and Proposal Costs |  |  |
Schedule of Accounting Policies [Line Items] |  |  |
Research and development expense, net | $ 179 | $ 188 | $ 217

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