CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023
OPERATING ACTIVITIES
Net income		$ 726	$ 989
Adjustments to reconcile net income to net change due to operating activities:
Provision (benefit) for credit losses		353	344
Net change in loans held for sale, at fair value		85	(451)
Depreciation, amortization and accretion		245	230
Deferred income tax expense (benefit)		(32)	(40)
Share-based compensation		55	55
Net gain on sale of assets		(5)	(14)
Net (increase) decrease in other assets		277	(827)
Net increase (decrease) in other liabilities		(316)	990
Net change due to operating activities		1,388	1,276
Investment securities:
Purchases of debt securities available for sale		(4,487)	(3,206)
Proceeds from maturities and paydowns of debt securities available for sale		1,318	929
Proceeds from sales of debt securities available for sale		703	1,632
Proceeds from maturities and paydowns of debt securities held to maturity		324	369
Net (increase) decrease in interest-bearing deposits in banks		(154)	19
Purchases of loans		(440)	0
Sales of loans		125	2,335
Net (increase) decrease in loans and leases		3,831	2,659
Capital expenditures, net		(40)	(91)
Other		38	(5)
Net change due to investing activities		1,218	4,641
FINANCING ACTIVITIES
Net increase (decrease) in deposits		(990)	(3,057)
Net increase (decrease) in short-term borrowed funds		(503)	1,096
Proceeds from issuance of long-term borrowed funds		10,853	12,217
Repayments of long-term borrowed funds		(11,256)	(14,004)
Treasury stock purchased		(500)	(656)
Net proceeds from issuance of preferred stock		391	0
Dividends paid to common stockholders		(391)	(410)
Dividends paid to preferred stockholders		(61)	(57)
Other		(6)	(26)
Net change due to financing activities		(2,463)	(4,897)
Net change in cash and cash equivalents	[1]	143	1,020
Cash and cash equivalents at beginning of period	[1]	11,628	10,547
Cash and cash equivalents at end of period	[1]	11,771	11,567
Non-cash items:
Transfer of loans from loans held for investment to loans held for sale		215	2,401
Loans securitized and transferred to AFS securities		$ 133	$ 0

[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.