Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 8,107	$ 2,535
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $21 and $13	(374)	(874)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $12 and $30	(98)	(203)
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0 and $4	(14)	0
Net unrealized gains (losses) on available-for-sale debt securities	(112)	(203)
Other comprehensive income (loss)	(486)	(1,077)
Comprehensive income	$ 7,621	$ 1,458