Segment and Revenue Information - Schedule of Capital Expenditures by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Capital expenditures	$ 2,942	$ 2,230	$ 1,527
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Capital expenditures	626	508	420
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Capital expenditures	373	296	192
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Capital expenditures	187	212	127
Other
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,756	$ 1,214	$ 788