Segment and Revenue Information - Schedule of Capital Expenditures by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Capital expenditures	$ 1,275	$ 674
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Capital expenditures	175	106
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Capital expenditures	82	54
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Capital expenditures	24	26
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Capital expenditures	$ 994	$ 488