Accounts Receivable and Loans (Details 3)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
U S Card Services [Member] | Card Member Loans [Member]
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate - Principal Only	1.40%	1.60%
Net Write-Off Rate - Principal, Interest, and Fees	1.60%	1.90%
30 Days Past Due as a % of Total	0.90%	0.90%
U S Card Services [Member] | Card Member Receivables [Member]
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate - Principal Only	1.90%	1.80%
Net Write-Off Rate - Principal, Interest, and Fees	2.10%	2.00%
30 Days Past Due as a % of Total	1.50%	1.50%
International Card Services [Member] | Card Member Loans [Member]
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate - Principal Only	2.00%	2.00%
Net Write-Off Rate - Principal, Interest, and Fees	2.50%	2.40%
30 Days Past Due as a % of Total	1.60%	1.60%
International Card Services [Member] | Card Member Receivables [Member]
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate - Principal Only	2.00%	2.00%
Net Write-Off Rate - Principal, Interest, and Fees	2.10%	2.20%
30 Days Past Due as a % of Total	1.40%	1.30%
Global Commercial Services [Member] | Card Member Receivables [Member]
Credit Quality Indicator for Loans and Receivables
Net Loss Ratio as a % of Charge Volume	0.10%	0.09%
90 days past billing as a percentage of receivables	0.70%	0.70%