Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	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