Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 3,156	$ 6,331	$ 19,041	$ 14,109
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $(15), $39, $(2) and $35	(537)	408	(752)	(260)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $(10), $3, $(73) and $31	(5)	35	(109)	239
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $5, $5, $7 and $13	(8)	(17)	(34)	(22)
Net unrealized gains (losses) on available-for-sale debt securities	(13)	18	(143)	217
Total other comprehensive income (loss)	(550)	426	(895)	(43)
Comprehensive income	$ 2,606	$ 6,757	$ 18,146	$ 14,066