Subsequent Events (Narrative) (Details) (USD $)	6 Months Ended		1 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jul. 31, 2012 BankAtlantic	Jul. 31, 2012 Junior Subordinated Debt to Unconsolidated Trusts [Member]	Jul. 31, 2012 Series E Preferred Stock [Member]
Subsequent Event [Line Items]
Repayment of long-term debt	$ 197,000,000	$ 392,000,000		$ 3,100,000,000
Preferred stock					1,200,000,000
Preferred Stock, Dividend Rate, Percentage					5.625%
Acquired loans			1,800,000,000
Assumed deposits			3,500,000,000
Assumed trust preferred securities			285,000,000
Preferred interest			95.00%
Incremental guarantee			35,000,000
Preference Amount			285,000,000
Net cash received, excluding cash held			45,000,000
Deposit premium			$ 316,000,000