Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 6,331	$ 2,134	$ 14,109	$ 8,320
Net change in foreign currency translation adjustments:
Foreign currency translation adjustments, net of tax of $1, $(15), $(6) and $(2)	408	(368)	(260)	(369)
Reclassification adjustment for foreign currency translation included in “Other operating expense (income), net,” net of tax of $29, $0, $29 and $0	0	(108)	0	(108)
Net foreign currency translation adjustments	408	(476)	(260)	(477)
Net change in unrealized gains (losses) on available-for-sale debt securities:
Unrealized gains (losses), net of tax of $(2), $(10), $(13) and $(73)	35	9	239	85
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” net of tax of $0, $5, $0 and $7	(17)	(2)	(22)	(2)
Net unrealized gains (losses) on available-for-sale debt securities	18	7	217	83
Other comprehensive income (loss)	426	(469)	(43)	(394)
Comprehensive income	$ 6,757	$ 1,665	$ 14,066	$ 7,926