Subsequent Events (Narrative) (Details) (USD $)					9 Months Ended			9 Months Ended	10 Months Ended		9 Months Ended		10 Months Ended					11 Months Ended
	Sep. 30, 2012		Dec. 31, 2011		Sep. 30, 2012 Smartstreet [Member]	Oct. 26, 2012 Smartstreet [Member]	Oct. 26, 2012 Core Deposit Intangibles [Member] Smartstreet [Member]	Sep. 30, 2012 Subordinated Debts [Member]	Oct. 22, 2012 Subordinated Debts [Member]	Oct. 22, 2012 Trust Preferred Securities [Member]	Sep. 30, 2012 Normal APEX Outstanding [Member]	Sep. 30, 2012 Normal APEX Outstanding [Member] Trust Preferred Securities [Member]	Nov. 01, 2012 Subordinated Notes [Member]	Nov. 01, 2012 Senior Notes [Member]	Nov. 09, 2012 Senior Notes [Member]	Jun. 10, 2012 Senior Notes [Member]	Dec. 10, 2012 National City Preferred Capital Trust I [Member]	Dec. 10, 2012 Series M Preferred Stock [Member]	Dec. 10, 2012 Normal APEX Redemption [Member] Trust Preferred Securities [Member]
Subsequent Event [Line Items]
Subsequent Event, Announcement Date					Oct. 26, 2012			Oct. 22, 2012			Nov. 01, 2012
Debt Instrument - Face value									$ 1,000,000,000			$ 500,000,000							$ 500,000,000
Final maturity date									Nov. 01, 2022				Jan. 01, 2043	Nov. 09, 2022
Stated interest rate										2.70%		12.00%	8.729%		2.854%	8.729%
Pending Divestiture Assets					1,000,000,000
Pending Divestiture Deposits					1,000,000,000
Disposal Group Including Discontinued Operation Goodwill						46,000,000
Disposal Group Including Discontinued Operation Intangible Assets Net							13,000,000
Disposal Group Including Discontinued Operation Accrued Income Taxes Payable						32,000,000
Junior Subordinated Notes													500,100,000
Senior Notes														500,100,000
Debt Instrument Issuance Date														Nov. 09, 2012
Preferred Stock issued, value		[1]		[1]														500,100,000
Preferred Stock Redeemed																		500,100,000
Common Securities To Be Redeemed																	$ 100,000
Preferred Stock Redemption Date																		Nov. 09, 2012
Debt Conversion Date																			Nov. 09, 2012

[1] Par value less than $.5 million at each date.