Loans and Card Member Receivables (Details 2)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Credit Quality Indicator for Loans and Receivables
90+ Days Past Billing as a % of total	0.30%	0.40%
GCSG | Card Member Loans
Credit Quality Indicator for Loans and Receivables
30+ Days Past Due as a % of Total	0.80%	1.00%
GCSG | Card Member Loans | Net Write-Off Rate - Principal Only
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.80%	1.40%
GCSG | Card Member Loans | Net Write-Off Rate Principal Interest, and Fees
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	1.10%	1.80%
GCSG | Card Member Receivables
Credit Quality Indicator for Loans and Receivables
30+ Days Past Due as a % of Total	0.70%	0.60%
GCSG | Card Member Receivables | Net Write-Off Rate - Principal Only
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.50%	0.50%
GCSG | Card Member Receivables | Net Write-Off Rate Principal Interest, and Fees
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.50%	0.60%
GCS | Global Small Business Services | Card Member Loans
Credit Quality Indicator for Loans and Receivables
30+ Days Past Due as a % of Total	0.60%	0.60%
GCS | Global Small Business Services | Card Member Loans | Net Write-Off Rate - Principal Only
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.60%	1.00%
GCS | Global Small Business Services | Card Member Loans | Net Write-Off Rate Principal Interest, and Fees
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.70%	1.20%
GCS | Global Small Business Services | Card Member Receivables
Credit Quality Indicator for Loans and Receivables
30+ Days Past Due as a % of Total	0.90%	0.60%
GCS | Global Small Business Services | Card Member Receivables | Net Write-Off Rate - Principal Only
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.70%	0.50%
GCS | Global Small Business Services | Card Member Receivables | Net Write-Off Rate Principal Interest, and Fees
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.80%	0.50%
GCS | Global Corporate Payments | Card Member Receivables | Net Write-Off Rate Principal Interest, and Fees
Credit Quality Indicator for Loans and Receivables
Net Write-Off Rate	0.20%	0.40%