CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,036	$ 395
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(33)	5
Net unrealized gains (losses) on securities	(524)	322
Net unrealized gains (losses) on derivatives	0	(1)
Total other comprehensive income (loss), net of tax	(557)	326
Total comprehensive income	$ 1,479	$ 721