Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 2,099	$ 2,235
Other comprehensive income (loss):
Net unrealized debt securities (losses) gains, net of tax	(28)	(12)
Foreign currency translation adjustments, net of hedges and tax	(20)	(17)
Net unrealized pension and other postretirement benefits, net of tax	20	26
Other comprehensive income (loss)	(28)	(3)
Comprehensive income	$ 2,071	$ 2,232