Consolidated Statement of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 2,693	$ 2,420	$ 2,242
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes of $86, ($40) and $2, respectively		(413)	488
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes of ($344), $165 and $212, respectively		(912)	436
Net unrealized gains on available-for-sale securities designated in fair value hedges, net of related taxes of $6, $1 and $6, respectively		16	3	18
Non-credit impairment on held-to-maturity securities previously identified under ASC 320, net of related taxes of $0, $0 and $1, respectively (1)	[1]	0	0
Net unrealized gains (losses) on cash flow hedges, net of related taxes of ($24), $46 and $9, respectively		(59)	127
Net unrealized gains (losses) on retirement plans, net of related taxes of $16, $3 and $(8), respectively		48	9
Other comprehensive income (loss)		(1,320)	1,063	564
Total comprehensive income		$ 1,373	$ 3,483	$ 2,806

[1] We adopted ASC 326, on January 1, 2020. Non-credit impairment on HTM securities was previously recognized under ASC 320.