Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 21,331	$ 11,588	$ 10,073
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $6, $(5), and $(36)	561	78	(538)
Reclassification adjustment for foreign currency translation included in “Other operating expense (income), net,” net of tax of $0, $29, and $0	0	(108)	0
Net foreign currency translation adjustments	561	(30)	(538)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $0, $(12), and $(83)	273	83	(17)
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0, $0, and $8	(28)	(4)	8
Net unrealized gains (losses) on available-for-sale debt securities	245	79	(9)
Total other comprehensive income (loss)	806	49	(547)
Comprehensive income	$ 22,137	$ 11,637	$ 9,526