Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Net income	$ 912	$ 1,010	$ 857
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Provision for credit losses	95	(310)	503
Deferred income tax expense (benefit)	91	0	(18)
Depreciation and amortization of premises and equipment	59	61	52
Amortization of intangible assets	51	56	40
Net other amortization and accretion	(11)	(67)	(30)
Net decrease in trading securities	2,120	1,824	1,912
Net (increase) decrease in derivatives	524	412	(223)
Purchase accounting gain	0	1	(533)
Stock-based compensation expense	75	43	32
Securities (gains) losses, net	(18)	(13)	6
Loss on debt extinguishment	0	26	0
Net (gains) losses on sale/disposal of fixed assets	(1)	29	8
(Gain) loss on BOLI	(9)	(8)	(5)
Gain on sale of mortgage servicing rights	(12)	0	0
Gain on sale of title services business	(22)	0	0
Loans held for sale:
Purchases and originations	(3,728)	(6,644)	(4,710)
Gross proceeds from settlements and sales	2,310	4,451	2,907
(Gain) loss due to fair value adjustments and other	107	(205)	(81)
Other operating activities, net	(232)	75	(545)
Total adjustments	1,399	(269)	(685)
Net cash provided by operating activities	2,311	741	172
Investing Activities
Proceeds from sales of securities available for sale	0	68	629
Proceeds from maturities of securities available for sale	1,351	2,771	4,099
Purchases of securities available for sale	(2,767)	(3,736)	(4,740)
Purchases of securities held to maturity	(712)	(720)	0
Proceeds from prepayments of securities held to maturity	55	17	0
Proceeds from sales of premises and equipment	18	42	12
Purchases of premises and equipment	(28)	(53)	(58)
Proceeds from BOLI	22	22	12
Net (increase) decrease in loans and leases	(3,224)	3,509	(819)
Net (increase) decrease in interest-bearing deposits with banks	13,523	(6,556)	(6,187)
Cash received for acquisitions, net	0	0	2,071
Other investing activities, net	75	19	14
Net cash provided by (used in) investing activities	8,313	(4,617)	(4,967)
Common stock:
Stock options exercised	36	28	7
Cash dividends paid	(324)	(333)	(222)
Repurchase of shares	(12)	(416)	(4)
Cancellation of common shares	0	0	(7)
Preferred stock issuance	494	145	144
Call of preferred stock	0	(100)	0
Cash dividends paid - preferred stock - noncontrolling interest	(11)	(11)	(12)
Cash dividends paid - preferred stock	(32)	(33)	(17)
Net increase (decrease) in deposits	(11,406)	4,919	7,143
Net increase (decrease) in short-term borrowings	382	(75)	(1,529)
Increases (decreases) in term borrowings	4	(108)	(327)
Net cash provided by (used in) financing activities	(10,869)	4,016	5,176
Net increase (decrease) in cash and cash equivalents	(245)	140	381
Cash and cash equivalents at beginning of period	1,788	1,648	1,267
Cash and cash equivalents at end of period	1,543	1,788	1,648
Supplemental Disclosures
Total interest paid	280	170	261
Total taxes paid	20	258	105
Total taxes refunded	7	30	36
Transfer from loans to OREO	3	4	2
Transfer from loans HFS to trading securities	1,893	2,232	1,742
Transfer from loans to loans HFS	$ 0	$ 31	$ 9