Loan Receivables (Schedule of Delinquent Loans Receivable Aging) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	$ 2,138
30-89 Days Delinquent [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	290
90 or More Days Delinquent [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	208
Credit Card Loans [Member] \| Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	1,882
Credit Card Loans [Member] \| 30-89 Days Delinquent [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	252
Credit Card Loans [Member] \| 90 or More Days Delinquent [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	196
Total Other Loans [Member] \| Financial Asset, 1 to 29 Days Past Due \| Private Student Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	147
Total Other Loans [Member] \| Financial Asset, 1 to 29 Days Past Due \| Personal Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	109
Total Other Loans [Member] \| 30-89 Days Delinquent [Member] \| Private Student Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	18
Total Other Loans [Member] \| 30-89 Days Delinquent [Member] \| Personal Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	20
Total Other Loans [Member] \| 90 or More Days Delinquent [Member] \| Private Student Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	8
Total Other Loans [Member] \| 90 or More Days Delinquent [Member] \| Personal Loans [Member]
Financing Receivable, Troubled Debt Restructuring [Line Items]
Financing Receivable, Modified, Accumulated	$ 4