Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 634	$ 508
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of ($10) and ($3), respectively	(300)	(26)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of $35 and $108, respectively	134	272
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of ($3) and ($1), respectively	(7)	(2)
Net unrealized gains (losses) on cash flow hedges, net of related taxes of $44 and $9, respectively	117	24
Net unrealized gains (losses) on retirement plans, net of related taxes of $4 and ($4), respectively	12	(8)
Other comprehensive income (loss)	(44)	260
Total comprehensive income	$ 590	$ 768