Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
OPERATING ACTIVITIES
Net income (loss)	$ 680	$ 662
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Provision (credit) for loan and lease losses	111	172
Provision (credit) for losses on lending-related commitments	11	(2)
Provision (credit) for losses on LIHTC guaranteed funds	4
Depreciation, amortization and accretion expense, net	147	162
Stock-based compensation expense	27	38
FDIC (payments) net of FDIC expense	296	19
Deferred income taxes (benefit)	(4)	36
Proceeds from sales of loans held for sale	3,821	3,737
Originations of loans held for sale, net of repayments	(3,779)	(3,507)
Net losses (gains) on sales of loans held for sale	(91)	(93)
Net losses (gains) from principal investing	(32)	(70)
Net losses (gains) and writedown on OREO	5	12
Net losses (gains) on leased equipment	(36)	(109)
Net losses (gains) on sales of fixed assets	9
Net decrease (increase) in trading account assets	(201)	(40)
Other operating activities, net	52	(369)
NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES	1,020	648
INVESTING ACTIVITIES
Cash received (used) in acquisitions, net of cash acquired	817	866
Proceeds from sale of Victory	72
Gain on sale of Victory	(92)
Net decrease (increase) in short-term investments	405	1,311
Purchases of securities available for sale	(4,628)	(232)
Proceeds from sales of securities available for sale	29	1
Proceeds from prepayments and maturities of securities available for sale	3,725	4,159
Proceeds from prepayments and maturities of held-to-maturity securities	667	437
Purchases of held-to-maturity securities	(1,572)	(2,481)
Purchases of other investments	(30)	(48)
Proceeds from sales of other investments	39	17
Proceeds from prepayments and maturities of other investments	82	134
Net decrease (increase) in loans, excluding acquisitions, sales and transfers	(1,077)	(1,342)
Proceeds from sales of portfolio loans	150	207
Purchases of premises and equipment	(60)	(101)
Proceeds from sales of premises and equipment	8	1
Proceeds from sales of other real estate owned	19	55
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	(1,446)	2,984
FINANCING ACTIVITIES
Net increase (decrease) in deposits, excluding acquisitions	1,605	184
Net increase (decrease) in short-term borrowings	26	86
Net proceeds from issuance of long-term debt	1,013	59
Payments on long-term debt	(1,540)	(3,381)
Repurchase of Common Shares	(375)	(163)
Net proceeds from reissuance of Common Shares	22	2
Tax benefits in excess of reorganized compensation costs for share-based payment	1
Cash dividends paid	(162)	(139)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	590	(3,352)
NET INCREASE (DECREASE) IN CASH AND DUE FROM BANKS	164	280
CASH AND DUE FROM BANKS AT BEGINNING OF PERIOD	584	693
CASH AND DUE FROM BANKS AT END OF PERIOD	748	973
Additional disclosures relative to cash flows:
Interest paid	271	302
Income taxes paid (refunded)	114	39
Noncash items:
Assets acquired	41	1,194
Liabilities assumed		2,059
Loans transferred to portfolio from held for sale	2	41
Loans transferred to held for sale from portfolio	53	80
Loans transferred to other real estate owned	$ 16	$ 32