Segment and Revenue Information - Schedule of Capital Expenditures by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Capital expenditures	$ 885	$ 611	$ 1,986	$ 1,582
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Capital expenditures	166	131	409	357
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Capital expenditures	93	60	206	195
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Capital expenditures	53	40	122	111
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Capital expenditures	$ 573	$ 380	$ 1,249	$ 919