v3.24.4
Loan Receivables (Schedule of Financing Receivable, Modified, Subsequent Default) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
Carrying Value [Member] | Credit Card Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount $ 383
Carrying Value [Member] | Credit Card Loans [Member] | Contractual Interest Rate Reduction  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 383
Carrying Value [Member] | Total Other Loans [Member] | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 25
Carrying Value [Member] | Total Other Loans [Member] | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 23
Carrying Value [Member] | Total Other Loans [Member] | Payment Deferral | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 5
Carrying Value [Member] | Total Other Loans [Member] | Payment Deferral | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 2
Carrying Value [Member] | Total Other Loans [Member] | InterestRateReductionandPaymentDeferral | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 20
Carrying Value [Member] | Total Other Loans [Member] | InterestRateReductionandPaymentDeferral | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 10
Carrying Value [Member] | Total Other Loans [Member] | Extended Maturity | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 4
Carrying Value [Member] | Total Other Loans [Member] | Extended Maturity and Interest Rate Reduction | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 7
Credit Card Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 210
Credit Card Loans [Member] | Contractual Interest Rate Reduction  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 210
Total Other Loans [Member] | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 21
Total Other Loans [Member] | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 8
Total Other Loans [Member] | Payment Deferral | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 4
Total Other Loans [Member] | Payment Deferral | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 1
Total Other Loans [Member] | InterestRateReductionandPaymentDeferral | Private Student Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 17
Total Other Loans [Member] | InterestRateReductionandPaymentDeferral | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 2
Total Other Loans [Member] | Extended Maturity | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount 2
Total Other Loans [Member] | Extended Maturity and Interest Rate Reduction | Personal Loans [Member]  
Financing Receivable, Troubled Debt Restructuring [Line Items]  
Defaulted Amount $ 3