Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
OPERATING ACTIVITIES
Net income (loss)	$ 219	$ 312
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision for credit losses	101	139
Depreciation, amortization, and accretion, net	24	41
Increase in cash surrender value of corporate-owned life insurance	(28)	(26)
Stock-based compensation expense	26	34
Deferred income taxes (benefit)	3	75
Proceeds from sales of loans held for sale	1,920	1,534
Originations of loans held for sale, net of repayments	(1,742)	(1,779)
Net losses (gains) on sales of loans held for sale	(28)	(15)
Net losses (gains) on leased equipment	(6)	(1)
Net securities and other investments losses (gains)	3	0
Net losses (gains) on sales of fixed assets	0	12
Net change in:
Trading account assets	(29)	(289)
Accrued income and other assets	287	691
Accrued expense and other liabilities	(404)	(260)
Other operating activities, net	13	250
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	359	718
INVESTING ACTIVITIES
Net decrease (increase) in short-term investments, excluding acquisitions	(2,388)	(5,978)
Purchases of securities available for sale	(1,465)	(200)
Proceeds from sales of securities available for sale	637	0
Proceeds from prepayments and maturities of securities available for sale	515	563
Proceeds from prepayments and maturities of held-to-maturity securities	306	333
Purchases of held-to-maturity securities	0	(1,179)
Net decrease (increase) in other investments	(4)	(286)
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	2,613	(613)
Proceeds from sales of portfolio loans	151	25
Proceeds from corporate-owned life insurance	20	22
Purchases of premises, equipment, and software	(12)	(24)
Proceeds from sales of premises and equipment	1	1
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	374	(7,336)
FINANCING ACTIVITIES
Net increase (decrease) in deposits	(1,356)	1,553
Net increase (decrease) in short-term borrowings	(168)	1,972
Net proceeds from issuance of long-term debt	1,350	4,490
Payments on long-term debt	(1)	(1,201)
Open market common share repurchases	0	(38)
Employee equity compensation program Common Share repurchases	(26)	(34)
Net proceeds from reissuance of Common Shares	3	1
Cash dividends paid	(229)	(228)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(427)	6,515
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	306	(103)
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	941	887
CASH AND DUE FROM BANKS AT END OF PERIOD	1,247	784
Additional disclosures relative to cash flows:
Interest paid	990	426
Income taxes paid (refunded)	20	46
Noncash items:
Reduction of secured borrowing and related collateral	1	2
Loans transferred to portfolio from held for sale	105	17
Loans transferred to held for sale from portfolio	0	4
Loans transferred to OREO	2	3
CMBS risk retentions	0	52
ABS risk retentions	$ 0	$ 8