Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 2,535	$ 3,561
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $(1) and $21	(874)	(8)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $0 and $12	(203)	32
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0 and $0	0	1
Net unrealized gains (losses) on available-for-sale debt securities	(203)	33
Total other comprehensive income (loss)	(1,077)	25
Comprehensive income	$ 1,458	$ 3,586