CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities
Net income	$ 1,010	$ 857	$ 452
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	(310)	503	45
Deferred income tax expense (benefit)	0	(18)	14
Depreciation and amortization of premises and equipment	61	52	44
Amortization of intangible assets	56	40	25
Net other amortization and accretion	(67)	(30)	(3)
Net (increase) decrease in trading securities	1,824	1,912	1,423
Net (increase) decrease in derivatives	412	(223)	(134)
Purchase accounting gain	1	(533)	0
Stock-based compensation expense	43	32	22
Securities (gains) losses, net	(13)	6	0
Loss on debt extinguishment	26	0	0
Net (gains) losses on sale/disposal of fixed assets	29	8	22
(Gain) loss on BOLI	(8)	(5)	(5)
Loans held for sale:
Purchases and originations	(6,644)	(4,710)	(2,075)
Gross proceeds from settlements and sales	4,451	2,907	818
(Gain) loss due to fair value adjustments and other	(205)	(81)	(7)
Other operating activities, net	75	(545)	189
Total adjustments	(269)	(685)	378
Net cash provided by (used in) operating activities	741	172	830
Investing Activities
Proceeds from sales of securities available for sale	68	629	192
Proceeds from maturities of securities available for sale	2,771	4,099	800
Purchases of securities available for sale	(3,736)	(4,740)	(630)
Purchases of securities held to maturity	(720)	0	0
Proceeds from prepayments of securities held to maturity	17	0	0
Proceeds from sales of premises and equipment	42	12	20
Purchases of premises and equipment	(53)	(58)	(49)
Proceeds from sales and pay downs of loans classified as held to maturity	0	0	20
Proceeds from BOLI	22	12	14
Net (increase) decrease in loans and leases	3,509	(819)	(3,570)
Net (increase) decrease in interest-bearing deposits with banks	(6,556)	(6,187)	795
Cash (paid) received for acquisitions, net	0	2,071	0
Other investing activities, net	19	14	18
Net cash provided by (used in) investing activities	(4,617)	(4,967)	(2,390)
Common stock:
Stock options exercised	28	7	9
Cash dividends paid	(333)	(222)	(171)
Repurchase of shares	(416)	(4)	(134)
Cancellation of common shares	0	(7)	0
Preferred stock issuance	145	144	0
Call of preferred stock	(100)	0	0
Cash dividends paid - preferred stock - noncontrolling interest	(11)	(12)	(11)
Cash dividends paid - preferred stock	(33)	(17)	(6)
Net increase (decrease) in deposits	4,919	7,143	(253)
Net increase (decrease) in short-term borrowings	(75)	(1,529)	2,384
Increases (decreases) in term borrowings	(108)	(327)	(396)
Net cash provided by (used in) financing activities	4,016	5,176	1,422
Net increase (decrease) in cash and cash equivalents	140	381	(138)
Cash and cash equivalents at beginning of period	1,648	1,267	1,405
Cash and cash equivalents at end of period	1,788	1,648	1,267
Supplemental Disclosures
Total interest paid	170	261	411
Total taxes paid	258	105	71
Total taxes refunded	30	36	28
Transfer from loans to OREO	4	2	9
Transfer from loans HFS to trading securities	2,232	1,742	1,321
Transfer from loans to loans HFS	$ 31	$ 9	$ 31