Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 1,816	$ 2,099
Other comprehensive income (loss):
Net unrealized debt securities gains (losses), net of tax	19	(28)
Foreign currency translation adjustments, net of hedges and tax	28	(20)
Net unrealized pension and other postretirement benefits, net of tax	57	20
Other comprehensive income (loss)	104	(28)
Comprehensive income	$ 1,920	$ 2,071