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Fair Value - Schedule of Fair Value Measurements - Recurring Basis (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | $ 865 | $ 871
Total available-for-sale securities | $ 22,684 | $ 22,410
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Finance receivables and loans, net | Finance receivables and loans, net
Investment in any one industry did not exceed percentage | 14.00% | 14.00%
Carrying amount, equity investments without a readily determinable fair value | $ 106 | $ 91
Fair value, measurements, recurring |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 22,684 | 22,410
Mortgage loans held-for-sale |  | 16
Derivative contracts in a receivable position | 4 | 12
Total assets | 23,498 | 23,258
Total derivative contracts in a payable position |  | 4
Total liabilities |  | 4
Fair value, measurements, recurring | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total derivative contracts in a payable position |  | 4
Fair value, measurements, recurring | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 810 | 820
Carrying amount, equity investments without a readily determinable fair value | 55 | 51
Fair value, measurements, recurring | U.S. Treasury and federal agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 2,194 | 1,873
Fair value, measurements, recurring | U.S. States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 554 | 617
Fair value, measurements, recurring | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 204 | 194
Fair value, measurements, recurring | Agency mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 12,822 | 13,653
Fair value, measurements, recurring | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 200 | 206
Fair value, measurements, recurring | Agency mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 4,782 | 3,984
Fair value, measurements, recurring | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 25 | 129
Fair value, measurements, recurring | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 1,903 | 1,754
Fair value, measurements, recurring | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position |  | 3
Fair value, measurements, recurring | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position | 4 | 9
Fair value, measurements, recurring | Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 2,229 | 1,909
Mortgage loans held-for-sale |  | 0
Derivative contracts in a receivable position | 0 | 0
Total assets | 3,039 | 2,729
Total derivative contracts in a payable position |  | 0
Total liabilities |  | 0
Fair value, measurements, recurring | Level 1 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total derivative contracts in a payable position |  | 0
Fair value, measurements, recurring | Level 1 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 810 | 820
Fair value, measurements, recurring | Level 1 | U.S. Treasury and federal agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 2,194 | 1,873
Fair value, measurements, recurring | Level 1 | U.S. States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 35 | 36
Fair value, measurements, recurring | Level 1 | Agency mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Agency mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 1 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position |  | 0
Fair value, measurements, recurring | Level 1 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position | 0 | 0
Fair value, measurements, recurring | Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 20,420 | 20,466
Mortgage loans held-for-sale |  | 11
Derivative contracts in a receivable position | 4 | 11
Total assets | 20,424 | 20,488
Total derivative contracts in a payable position |  | 0
Total liabilities |  | 0
Fair value, measurements, recurring | Level 2 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total derivative contracts in a payable position |  | 0
Fair value, measurements, recurring | Level 2 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 0 | 0
Fair value, measurements, recurring | Level 2 | U.S. Treasury and federal agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 2 | U.S. States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 519 | 582
Fair value, measurements, recurring | Level 2 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 169 | 158
Fair value, measurements, recurring | Level 2 | Agency mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 12,822 | 13,653
Fair value, measurements, recurring | Level 2 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 200 | 206
Fair value, measurements, recurring | Level 2 | Agency mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 4,782 | 3,984
Fair value, measurements, recurring | Level 2 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 25 | 129
Fair value, measurements, recurring | Level 2 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 1,903 | 1,754
Fair value, measurements, recurring | Level 2 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position |  | 2
Fair value, measurements, recurring | Level 2 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position | 4 | 9
Fair value, measurements, recurring | Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 35 | 35
Mortgage loans held-for-sale |  | 5
Derivative contracts in a receivable position | 0 | 1
Total assets | 35 | 41
Total derivative contracts in a payable position |  | 4
Total liabilities |  | 4
Fair value, measurements, recurring | Level 3 | Credit contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total derivative contracts in a payable position |  | 4
Fair value, measurements, recurring | Level 3 | Equity securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity securities | 0 | 0
Fair value, measurements, recurring | Level 3 | U.S. Treasury and federal agencies |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | U.S. States and political subdivisions |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 35 | 35
Fair value, measurements, recurring | Level 3 | Foreign government |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Agency mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Mortgage-backed residential |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Agency mortgage-backed commercial |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Asset-backed |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Corporate debt |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total available-for-sale securities | 0 | 0
Fair value, measurements, recurring | Level 3 | Interest rate contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position |  | 1
Fair value, measurements, recurring | Level 3 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Derivative contracts in a receivable position | $ 0 | $ 0

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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