Segment and Revenue Information - Schedule of Depreciation and Amortization Expense by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 573	$ 466
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Depreciation and amortization	190	101
Depreciation and amortization expense, business segment allocation	105	82
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Depreciation and amortization	60	50
Depreciation and amortization expense, business segment allocation	66	68
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Depreciation and amortization	69	73
Depreciation and amortization expense, business segment allocation	17	19
Unallocated items, eliminations and other
Segment Reporting Information [Line Items]
Depreciation and amortization	254	242
Intersegment revenues eliminated on consolidation
Segment Reporting Information [Line Items]
Depreciation and amortization expense, business segment allocation	$ 188	$ 169