Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 7,778	$ 5,243	$ 15,885	$ 7,778
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $(8), $(17), $13 and $(4)	159	207	(215)	(668)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $(73), $(2), $(61) and $28	(6)	407	(104)	205
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0, $4, $0 and $8	(12)	(6)	(26)	(6)
Net unrealized gains (losses) on available-for-sale debt securities	(18)	401	(130)	199
Total other comprehensive income (loss)	141	608	(345)	(469)
Comprehensive income	$ 7,919	$ 5,851	$ 15,540	$ 7,309