CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,760	$ 1,534	$ 1,893
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(13)	27	17
Net unrealized gains (losses) on securities	(665)	407	556
Net unrealized gains (losses) on derivatives	(1)	(1)	(2)
Defined benefit plans	53	(66)	(18)
Total other comprehensive income (loss), net of tax	(626)	367	553
Total comprehensive income	$ 2,134	$ 1,901	$ 2,446