Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
OPERATING ACTIVITIES
Net income (loss)	$ 242	$ 205
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision (credit) for loan and lease losses	6	55
Provision (credit) for losses on lending-related commitments	(2)	3
Provision (credit) for losses on LIHTC guaranteed funds	(6)
Depreciation, amortization and accretion expense, net	52	44
Increase in cash surrender value of corporate-owned life insurance	(24)	(25)
Stock-based compensation expense	11	10
FDIC reimbursement (payments), net of FDIC expense	(1)	7
Deferred income taxes (benefit)	40	32
Proceeds from sales of loans held for sale	611	1,287
Originations of loans held for sale, net of repayments	(383)	(1,075)
Net losses (gains) on sales of loans held for sale	(15)	(29)
Net losses (gains) from principal investing	(24)	(8)
Net losses (gains) and writedown on OREO	1	3
Net losses (gains) on leased equipment	(14)	(7)
Net losses (gains) on sales of fixed assets		3
Net decrease (increase) in trading account assets	(102)	(96)
Other operating activities, net	(236)	(178)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	156	231
INVESTING ACTIVITIES
Net decrease (increase) in short-term investments	2,668	859
Purchases of securities available for sale	(618)	(2,755)
Proceeds from sales of securities available for sale		3
Proceeds from prepayments and maturities of securities available for sale	650	1,315
Proceeds from prepayments and maturities of held-to-maturity securities	180	210
Purchases of held-to-maturity securities	(250)
Purchases of other investments	(17)	(11)
Proceeds from sales of other investments	122	3
Proceeds from prepayments and maturities of other investments	2	20
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(1,029)	136
Proceeds from sales of portfolio loans	21	57
Proceeds from corporate-owned life insurance	6	6
Purchases of premises, equipment, and software	(11)	(12)
Proceeds from sales of premises and equipment	1	8
Proceeds from sales of other real estate owned	5	5
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	1,730	(156)
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	(1,996)	(1,339)
Net increase (decrease) in short-term borrowings	4	433
Net proceeds from issuance of long-term debt	78	1,007
Payments on long-term debt	(10)	(30)
Repurchase of common shares	(130)	(65)
Net proceeds from issuance of common shares	15	8
Cash dividends paid	(55)	(52)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	(2,094)	(38)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	(208)	37
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	617	584
CASH AND DUE FROM BANKS AT END OF PERIOD	409	621
Additional disclosures relative to cash flows:
Interest paid	103	110
Income taxes paid (refunded)	10	25
Noncash items:
Secured borrowing less lease reductions	6
Loans transferred to portfolio from held for sale	2	1
Loans transferred to held for sale from portfolio	5	20
Loans transferred to other real estate owned	$ 3	$ 7