Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 8,374	$ 7,514	$ 8,060
Other comprehensive income (loss):
Net unrealized debt securities gains (losses), net of tax	50	(87)	(42)
Foreign currency translation adjustments, net of hedges and tax	51	(230)	(163)
Net unrealized pension and other postretirement benefits, net of tax	37	52	155
Other comprehensive income (loss)	138	(265)	(50)
Comprehensive income	$ 8,512	$ 7,249	$ 8,010