Segment and Revenue Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Segment Reporting Information [Line Items]
Total revenues	$ 22,217	$ 19,496
Research and development expense, net	903	844
Earnings from operations	448	461
Operating Segments
Segment Reporting Information [Line Items]
Earnings from operations	641	561
Operating Segments | Commercial Airplanes
Segment Reporting Information [Line Items]
Total revenues	9,203	8,147
Research and development expense, net	603	534
Other segment items	9,163	8,150
Earnings from operations	(563)	(537)
Operating Segments | Defense, Space & Security
Segment Reporting Information [Line Items]
Total revenues	7,599	6,298
Research and development expense, net	174	199
Other segment items	7,192	5,944
Earnings from operations	233	155
Operating Segments | Global Services
Segment Reporting Information [Line Items]
Total revenues	5,370	5,063
Research and development expense, net	22	29
Other segment items	4,377	4,091
Earnings from operations	$ 971	$ 943