Consolidated Statement of Comprehensive Income - USD ($)		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		$ 555,000,000	$ 583,000,000	$ 1,883,000,000	$ 1,678,000,000
Other comprehensive income (loss), net of related taxes:
Foreign currency translation, net of related taxes		283,000,000	(264,000,000)	135,000,000	(248,000,000)
Net unrealized gains (losses) on available-for-sale securities, net of reclassification adjustment and net of related taxes		2,000,000	136,000,000	463,000,000	665,000,000
Net unrealized gains (losses) on available-for-sale securities designated in fair value hedges, net of related taxes		4,000,000	10,000,000	0	13,000,000
Non-credit impairment on held-to-maturity securities previously identified under ASC 320, net of related taxes	[1]	0	1,000,000	0	2,000,000
Net unrealized gains (losses) on cash flow hedges, net of related taxes		29,000,000	7,000,000	152,000,000	32,000,000
Net unrealized gains (losses) on retirement plans, net of related taxes		1,000,000	(1,000,000)	15,000,000	(9,000,000)
Other comprehensive income		319,000,000	(111,000,000)	765,000,000	455,000,000
Total comprehensive income		$ 874,000,000	$ 472,000,000	$ 2,648,000,000	$ 2,133,000,000

[1] We adopted ASU 2016-13, Financial Instruments - Credit Losses (ASC 326) : Measurement of Credit Losses on Financial Instruments, on January 1, 2020. Non-credit impairment on HTM securities was previously recognized under ASC 320. Please refer to Note 1 for additional information.