Other Noninterest Income and Other Noninterest Expense (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other noninterest income:
Private equity investment income		$ 75	$ 65	$ 63
Income from the TRA associated with Worldpay, Inc.		74	346	20
BOLI income		63	60	56
Cardholder fees		44	58	56
Consumer loan and lease fees		20	23	23
Banking center income		20	22	21
Insurance income		20	19	20
Loss on swap associated with the sale of Visa, Inc. Class B Shares		(103)	(107)	(59)
Net losses on disposition and impairment of bank premises and equipment		(31)	(23)	(43)
Gain on sale of Worldpay, Inc. shares		0	562	205
Equity method income from interest in Worldpay Holding, LLC		0	2	1
Gain related to Vantiv, Inc.’s acquisition of Worldpay Group plc.		0	0	414
Other, net		29	37	26
Total other noninterest income	[1]	211	1,064	803
Other noninterest expense:
Loan and lease		162	142	112
FDIC insurance and other taxes		118	81	119
Losses and adjustments		100	102	61
Data processing		75	70	57
Professional service fees		49	70	67
Intangible amortization		48	45	5
Postal and courier		36	38	35
Donations		36	30	21
Travel		27	68	52
Recruitment and education		21	28	32
Insurance		15	14	13
Supplies		13	14	13
Other, net		221	232	210
Other noninterest expense	[1]	$ 921	$ 934	$ 797

[1] During the first quarter of 2020, certain noninterest income and noninterest expense line items were reclassified to better align disclosures to business activities. These reclassifications were retrospectively applied to all prior periods presented. Total noninterest income and noninterest expense did not change as a result of these reclassifications.