Litigation and Regulatory Matters (Details Textual) (USD $)	6 Months Ended		12 Months Ended		6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2012 Cards Litigation [Member] ClassAction	Jun. 30, 2012 Securities Litigation [Member]	Dec. 31, 2011 Securities Litigation [Member] claims	Aug. 31, 2002 Securities Litigation [Member] States	Jun. 30, 2012 Debt Cancellation Litigation [Member] ClassAction Companies	Dec. 31, 2011 Foreclosure Litigation [Member]	Jun. 30, 2012 Foreclosure Litigation [Member] Servicers States	Jun. 30, 2012 Maximum [Member]	Jun. 30, 2012 Maximum [Member] Securities Litigation [Member]	Jun. 30, 2012 Minimum [Member]	Jun. 30, 2012 Minimum [Member] Securities Litigation [Member]
Litigation and Regulatory Matters (Additional Textual) [Abstract]
Estimated damage									$ 3,200,000,000		$ 2,400,000,000
Aggregate Amount of Claims			2,230,000,000
Number of states in 2002 settlement				46
Total claims of loss			45,921
Number of days to appeal verdict to Seventh Circuit Court of Appeals		30 days
Possible amount of damages		3,500,000,000
Possible future expenses related to amount of damages		3,000,000,000
Number of credit card companies have lawsuits					7
Number of U.S. mortgage servicers							5
Lump sum payment due as remediation available to borrower, Range								125,000		500
Accrual						$ 157,000,000
Class actions filed	4				8
Number of states in settlement with US mortgage servicers							49