Segment and Revenue Information - Schedule of Depreciation and Amortization Expense by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 1,953	$ 1,836	$ 1,861
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Depreciation and amortization	455	400	464
Depreciation and amortization expense, business segment allocation	361	339	311
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Depreciation and amortization	221	209	219
Depreciation and amortization expense, business segment allocation	300	289	264
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Depreciation and amortization	296	304	320
Depreciation and amortization expense, business segment allocation	86	77	75
Other
Segment Reporting Information [Line Items]
Depreciation and amortization	981	923	858
Intersegment revenues, eliminated on consolidation
Segment Reporting Information [Line Items]
Depreciation and amortization expense, business segment allocation	$ 747	$ 705	$ 650