Segment and Revenue Information - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total revenues	$ 66,517	$ 77,794	$ 66,608
Research and development expense, net	3,812	3,377	2,852
Loss from operations	(10,707)	(773)	(3,519)
Operating Segments
Segment Reporting Information [Line Items]
Loss from operations	(9,764)	(70)	(3,158)
Operating Segments | BCA
Segment Reporting Information [Line Items]
Total revenues	22,861	33,901	26,026
Research and development expense, net	2,386	2,036	1,510
Other segment items	28,444	33,500	26,857
Loss from operations	(7,969)	(1,635)	(2,341)
Operating Segments | BDS
Segment Reporting Information [Line Items]
Total revenues	23,918	24,933	23,162
Research and development expense, net	917	919	945
Other segment items	28,414	25,778	25,761
Loss from operations	(5,413)	(1,764)	(3,544)
Operating Segments | BGS
Segment Reporting Information [Line Items]
Total revenues	19,954	19,127	17,611
Research and development expense, net	132	107	119
Other segment items	16,204	15,691	14,765
Loss from operations	$ 3,618	$ 3,329	$ 2,727