Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 519	$ 634
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $53 and ($10), respectively	(200)	(300)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of ($161) and $35, respectively	(425)	134
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of $4 and ($3), respectively	12	(7)
Net unrealized gains (losses) on cash flow hedges, net of related taxes of $0 and $44, respectively	0	117
Net unrealized gains (losses) on retirement plans, net of related taxes of $3 and $4, respectively	8	12
Other comprehensive income (loss)	(605)	(44)
Total comprehensive income (loss)	$ (86)	$ 590