Segment and Revenue Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Total revenues	$ 89,463	$ 66,517	$ 77,794
Research and development expense, net	3,615	3,812	3,377
Gain on Digital Aviation Solutions Divestiture	(9,672)	(46)	(2)
Earnings/(loss) from operations	4,281	(10,707)	(773)
Operating Segments
Segment Reporting Information [Line Items]
Earnings/(loss) from operations	6,267	(9,764)	(70)
Operating Segments | BCA
Segment Reporting Information [Line Items]
Total revenues	41,494	22,861	33,901
Research and development expense, net	2,202	2,386	2,036
Gain on Digital Aviation Solutions Divestiture
Other segment items	46,371	28,444	33,500
Earnings/(loss) from operations	(7,079)	(7,969)	(1,635)
Operating Segments | BDS
Segment Reporting Information [Line Items]
Total revenues	27,234	23,918	24,933
Research and development expense, net	877	917	919
Gain on Digital Aviation Solutions Divestiture
Other segment items	26,485	28,414	25,778
Earnings/(loss) from operations	(128)	(5,413)	(1,764)
Operating Segments | BGS
Segment Reporting Information [Line Items]
Total revenues	20,923	19,954	19,127
Research and development expense, net	125	132	107
Gain on Digital Aviation Solutions Divestiture	(9,566)
Other segment items	16,890	16,204	15,691
Earnings/(loss) from operations	$ 13,474	$ 3,618	$ 3,329