CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net income		$ 857	$ 452	$ 557
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses		503	45	8
Deferred income tax expense (benefit)		(18)	14	104
Depreciation and amortization of premises and equipment		52	44	47
Amortization of intangible assets		40	25	26
Net other amortization and accretion		(30)	(3)	(14)
Net (increase) decrease in derivatives		(223)	(134)	42
Purchase accounting gain		(533)	0	0
Stock-based compensation expense		32	22	23
Securities (gains) losses, net		6	0	(213)
Net (gains) losses on sale/disposal of fixed assets		8	22	(1)
(Gain) loss on BOLI		(5)	(5)	(4)
Loans held for sale:
Purchases and originations		(4,710)	(2,075)	(2,345)
Gross proceeds from settlements and sales		2,907	818	919
(Gain) loss due to fair value adjustments and other		(81)	(7)	20
Other operating activities, net		1,367	1,612	1,065
Total adjustments		(685)	378	(323)
Net cash provided by (used in) operating activities		172	830	234
Investing Activities
Proceeds from sales of securities available for sale		629	192	21
Proceeds from maturities of securities available for sale		4,099	800	676
Purchases of securities available for sale		(4,740)	(630)	(473)
Proceeds from sales of premises and equipment		12	20	30
Purchases of premises and equipment		(58)	(49)	(48)
Proceeds from sales and pay down of loans classified as held to maturity		0	20	50
Proceeds from BOLI		12	14	13
Net (increase) decrease in loans and leases		(819)	(3,570)	105
Net (increase) decrease in interest-bearing deposits with banks		(6,187)	795	(92)
Cash (paid) received for acquisitions, net		2,071	0	(46)
Other investing activities, net		14	18	244
Net cash provided by (used in) investing activities		(4,967)	(2,390)	480
Common stock:
Stock options exercised		7	9	5
Cash dividends paid		(222)	(171)	(139)
Repurchase of shares (a)	[1]	(4)	(134)	(105)
Cancellation of common shares		(7)	0	0
Preferred stock issuance		144	0	0
Cash dividends paid - preferred stock - noncontrolling interest		(12)	(11)	(12)
Cash dividends paid - preferred stock		(17)	(6)	(6)
Net increase (decrease) in deposits		7,143	(253)	2,093
Net increase (decrease) in short-term borrowings		(1,529)	2,384	(2,549)
Proceeds from issuance of term borrowings		1,249	0	0
Payments/maturities on term borrowings		(1,570)	(406)	(69)
Increases (decreases) in restricted and secured term borrowings		(6)	10	21
Net cash provided by (used in) financing activities		5,176	1,422	(761)
Net increase (decrease) in cash and cash equivalents		381	(138)	(47)
Cash and cash equivalents at beginning of period		1,267	1,405	1,452
Cash and cash equivalents at end of period		1,648	1,267	1,405
Supplemental Disclosures
Total interest paid		261	411	308
Total taxes paid		105	71	43
Total taxes refunded		36	28	48
Transfer from loans to OREO		2	9	12
Transfer from loans HFS to trading securities		1,742	1,321	1,389
Transfer from loans to loans HFS		$ 9	$ 31	$ 0

[1] 2019 and 2018 include $130 million and $99 million, respectively, repurchased under share repurchase programs.