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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 2,714	$ 5,546	$ 6,015
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on securities available for sale	1,259	650	(459)
Net unrealized gains (losses) on hedging relationships	1,008	772	(74)
Foreign currency translation adjustments	76	70	(39)
Net changes in securities held to maturity	0	26	447
Other	3	13	(11)
Other comprehensive income (loss), net of tax	2,346	1,531	(136)
Comprehensive income	$ 5,060	$ 7,077	$ 5,879

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