Restrictions on Cash and Dividends - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2008
Restricted Cash and Cash Equivalents Items [Line Items]
Dividends paid by the Bancorp's state chartered bank	$ 2,000,000,000	$ 1,400,000,000
Dividend Received From Nonbank Companies And Related Subsidiaries	1,700,000,000	1,400,000,000
Banking Subsidiary Reserve Requirement	1,100,000,000	575,000,000
Subsidiary Deposit To FRB	1,500,000,000
Redemption of preferred shares, value	(3,408,000,000)
Common stock dividends restrictions			For the Bancorp, approval from the U.S. Treasury was required for common stock dividends in excess of $0.15 per share of common stock
Minimum Tier 1 Common Ratio	5.00%
Preferred stock Series F
Restricted Cash and Cash Equivalents Items [Line Items]
Issuance of senior preferred stock and related warrants			3,400,000,000
Redemption of preferred shares	136,320
Redemption of preferred shares, value	$ 3,400,000,000