Accounts Receivable and Loans (Details 6) - U S Card Services [Member] pure in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Financing Receivable, Modifications [Line Items]
Number of Accounts (in thousands)	11	11	21
Aggregated Outstanding Balance Upon Payment Default	$ 57	$ 64	$ 166
Card Member Loans [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts (in thousands)	8	8	18
Aggregated Outstanding Balance Upon Payment Default	$ 52	$ 52	$ 141
Card Member Receivables [Member]
Financing Receivable, Modifications [Line Items]
Number of Accounts (in thousands)	3	3	3
Aggregated Outstanding Balance Upon Payment Default	$ 5	$ 12	$ 25