Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net income (loss)	$ 409	$ 441
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision (credit) for loan and lease losses	83	63
Provision (credit) for losses on lending-related commitments	8	6
Provision (credit) for losses on LIHTC guaranteed funds	3
Depreciation, amortization and accretion expense, net	93	104
Stock-based compensation expense	19	27
FDIC (payments) net of FDIC expense	297	13
Deferred income taxes (benefit)	36	38
Proceeds from sales of loans held for sale	2,613	2,387
Originations of loans held for sale, net of repayments	(2,316)	(2,236)
Net losses (gains) on sales of loans held for sale	(64)	(54)
Net losses (gains) from principal investing	(15)	(59)
Net losses (gains) and writedown on OREO	4	12
Net losses (gains) on leased equipment	(8)	(63)
Net losses (gains) on sales of fixed assets	8
Net decrease (increase) in trading account assets	13	(57)
Other operating activities, net	(237)	(249)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	946	373
INVESTING ACTIVITIES
Cash received (used) in acquisitions, net of cash acquired	573
Net decrease (increase) in short-term investments	357	1,303
Purchases of securities available for sale	(4,030)	(10)
Proceeds from sales of securities available for sale	27
Proceeds from prepayments and maturities of securities available for sale	2,612	2,733
Proceeds from prepayments and maturities of held-to-maturity securities	434	238
Purchases of held-to-maturity securities	(1,253)	(2,481)
Purchases of other investments	(20)	(39)
Proceeds from sales of other investments	11	3
Proceeds from prepayments and maturities of other investments	49	72
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(451)	(373)
Proceeds from sales of portfolio loans	77	135
Purchases of premises and equipment	(34)	60
Proceeds from sales of premises and equipment	8	1
Proceeds from sales of other real estate owned	14	45
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(1,626)	1,567
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	1,038	211
Net increase (decrease) in short-term borrowings	49	30
Net proceeds from issuance of long-term debt	1,008	29
Payments on long-term debt	(1,033)	(2,019)
Repurchase of common shares	(177)	(82)
Net proceeds from issuance of Common Shares	14	1
Cash dividends paid	(107)	(87)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	792	(1,917)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	112	23
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	584	693
CASH AND DUE FROM BANKS AT END OF PERIOD	696	716
Additional disclosures relative to cash flows:
Interest paid	159	249
Income taxes paid (refunded)	62	26
Noncash items:
Loans transferred to portfolio from held for sale	2	39
Loans transferred to held for sale from portfolio	38	65
Loans transferred to other real estate owned	$ 14	$ 21