Consolidated Statement of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 763	$ 694	$ 1,282	$ 1,328
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of ($8) and $4, respectively	49	152	(151)	(148)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of ($14) and $132, respectively	(35)	327	(460)	461
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes of ($5) and $1, respectively	(16)	3	(4)	(4)
Net unrealized gains (losses) on cash flow hedges, net of related taxes of ($4) and $3, respectively	(4)	6	(4)	123
Net unrealized gains (losses) on retirement plans, net of related taxes of $1 and $1, respectively	2	2	10	14
Other comprehensive income (loss)	(4)	490	(609)	446
Total comprehensive income	$ 759	$ 1,184	$ 673	$ 1,774