Legal Proceedings (Details) (USD $)		12 Months Ended
	Sep. 30, 2012 Basis_Points	Dec. 31, 2013 Other event [Member]	Dec. 31, 2013 Visa settlement [Member] D M	Sep. 30, 2012 Visa settlement [Member]
Loss Contingencies [Line Items]
Settlement cash payment all parties				$ 6,600,000,000
Settlement Cash Payment Visa Share				4,400,000,000
Settlement Basis Point Reduction Credit Card Interchange	10
Number of months of interchange reduction			8
Number of Days Until Start of Reduction After Court Ordered Period			60
Percent Of Opt Out Merchants That Could Cause Agreement To Cancel				25.00%
Loss Due To Reduction In Credit Card Interchange Fees			5,200,000
Estimated Reduction in Overdraft Income, Minimum		6,000,000
Estimated Reduction in Overdraft Income, Maximum		$ 8,000,000