CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
OPERATING ACTIVITIES
Net income		$ 517	$ 373
Adjustments to reconcile net income to net change due to operating activities:
Provision (benefit) for credit losses		140	153
Net change in Loans held for sale		(285)	(332)
Depreciation, amortization, and accretion		113	123
Deferred income tax expense (benefit)		52	(16)
Share-based compensation		33	31
Net gain on sale of assets		(7)	(9)
Net (increase) decrease in Other assets		(256)	34
Net increase (decrease) in Other liabilities		(70)	(570)
Net change due to operating activities		237	(213)
Investment securities:
Purchases of debt securities available for sale		(2,516)	(2,365)
Proceeds from maturities and paydowns of debt securities available for sale		1,137	846
Proceeds from sales of debt securities available for sale		547	642
Proceeds from maturities and paydowns of debt securities held to maturity		158	150
Net (increase) decrease in Interest-bearing deposits in banks		131	(50)
Purchases of loans		(49)	(188)
Sales of loans		31	240
Net (increase) decrease in Loans and leases		(1,144)	(319)
Capital expenditures		0	(14)
Other		(97)	(50)
Net change due to investing activities		(1,802)	(1,108)
FINANCING ACTIVITIES
Net increase (decrease) in Deposits		722	2,800
Net increase (decrease) in Short-term borrowed funds		(4)	47
Proceeds from issuance of long-term borrowed funds		3,647	2,533
Repayments of long-term borrowed funds		(2,618)	(2,675)
Treasury stock purchased		(300)	(200)
Dividends paid to common stockholders		(198)	(186)
Dividends paid to preferred stockholders		(38)	(34)
Other		(43)	(24)
Net change due to financing activities		1,168	2,261
Net change in cash and cash equivalents	[1]	(397)	940
Cash and cash equivalents at beginning of period	[1]	12,727	10,601
Cash and cash equivalents at end of period	[1]	12,330	11,541
Non-cash items:
Transfer of loans from loans held for investment to LHFS		$ 72	$ 1,876

[1] Cash and cash equivalents include Cash and due from banks and Interest-bearing cash and due from banks as reflected on the Consolidated Balance Sheets.