Condensed Statement of Cash Flow - Parent Company Only (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2008
Operating Activities
Net income (loss)	$ 1,576		$ 1,297		$ 753
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision (benefit) for deferred income taxes	271		437		176
Goodwill impairment						965
Net change in:
Other assets	4		(67)		9
Accrued taxes, interest and expenses	1		79		(63)
Net Cash Provided by (Used in) Operating Activities	2,557		2,366		3,305
Net change in:
Other short-term investments	(640)		(267)		1,861
Net Cash (Used in) Provided by Investing Activities	(6,533)		(5,285)		1,708
Financing Activities
Net change in other short-term borrowings	3,041		1,665		38
Proceeds from issuance of long-term debt	523		1,500		14
Repayment of long-term debt	3,159		1,607		2,473
Dividends paid on common shares	309		192		32
Dividends paid on preferred shares	35		50		205
Common stock issued, value			1,648
Repurchase Treasury Shares And Forward Contracts	650
Redemption of Series F preferred shares and related warrants			3,408
Net Cash Used In Financing Activities	3,754		3,423		(5,172)
Increase (Decrease) in Cash and Due from Banks	(222)		504		(159)
Cash and Due from Banks at Beginning of Period	2,663	[1]	2,159		2,318
Cash and Due from Banks at End of Period	2,441	[1]	2,663	[1]	2,159
Parent Company [Member]
Operating Activities
Net income (loss)	1,576		1,297		753
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Provision (benefit) for deferred income taxes	2		(3)		(2)
Equity method income from interest in Vantiv, LLC	220		247		530
Net change in:
Other assets	57		39		(6)
Accrued taxes, interest and expenses	18		3		(339)
Other, net					(11)
Net Cash Provided by (Used in) Operating Activities	1,873		1,583		925
Net change in:
Other short-term investments	107		(635)		(603)
Loans to subsidiaries	(11)		(489)		161
Net Cash (Used in) Provided by Investing Activities	118		(146)		(764)
Financing Activities
Net change in other short-term borrowings	(89)		241		134
Proceeds from issuance of long-term debt	500		1,000
Repayment of long-term debt	1,440		400
Dividends paid on common shares	309		192		32
Dividends paid on preferred shares	35		50		205
Common stock issued, value			1,648
Repurchase Treasury Shares And Forward Contracts	650
Redemption of Series F preferred shares and related warrants			3,688
Other, net	(18)		(6)
Net Cash Used In Financing Activities	(2,041)		(1,447)		(103)
Increase (Decrease) in Cash and Due from Banks	(50)		(10)		58
Cash and Due from Banks at Beginning of Period	50		60		2
Cash and Due from Banks at End of Period	$ 0		$ 50		$ 60

[1] At December 31, 2012 and 2011, includes $0 and $30 of cash, $0 and $7 of other short-term investments, $50 and $50 of commercial mortgage loans, $0 and $223 of home equity loans, $0 and $259 of automobile loans, ($5) and ($10) of ALLL, $3 and $4 of other assets, $0 and $4 of other liabilities, $0 and $191 of long-term debt from consolidated VIEs that are included in their respective captions. See Note 10.