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Finance Receivables and Loans, Net (Schedule of Financing Receivables, Nonaccrual Status) (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | $ 1,252 |  | $ 1,394 | $ 1,454
Financing receivable, nonaccrual, with no allowance | 547 |  | 585 |
Financing receivable, nonaccrual, interest income | 5 | $ 3 |  |
Consumer |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 1,149 |  | 1,275 | 1,292
Financing receivable, nonaccrual, with no allowance | 538 |  | 564 |
Consumer | Automotive |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 1,010 |  | 1,129 | 1,187
Financing receivable, nonaccrual, with no allowance | 507 |  | 531 |
Consumer | Consumer mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 45 |  | 54 | 49
Financing receivable, nonaccrual, with no allowance | 31 |  | 33 |
Consumer | Mortgage Finance |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 33 |  | 41 | 34
Financing receivable, nonaccrual, with no allowance | 20 |  | 21 |
Consumer | Mortgage — Legacy |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 12 |  | 13 | 15
Financing receivable, nonaccrual, with no allowance | 11 |  | 12 |
Consumer | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 94 |  | 92 | 56
Financing receivable, nonaccrual, with no allowance | 0 |  | 0 |
Consumer | Personal Lending |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 0 |  | 0 | 13
Financing receivable, nonaccrual, with no allowance | 0 |  | 0 |
Consumer | Credit Card |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 94 |  | 92 | 43
Financing receivable, nonaccrual, with no allowance | 0 |  | 0 |
Commercial |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 103 |  | 119 | 162
Financing receivable, nonaccrual, with no allowance | 9 |  | 21 |
Commercial | Automotive |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 5 |  | 18 | 5
Financing receivable, nonaccrual, with no allowance | 4 |  | 13 |
Commercial | Consumer mortgage |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 1 |  | 3 | 0
Financing receivable, nonaccrual, with no allowance | 0 |  | 3 |
Commercial | Other |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Financing receivable, recorded investment, nonaccrual status | 97 |  | 98 | $ 157
Financing receivable, nonaccrual, with no allowance | $ 5 |  | $ 5 |

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