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Fair Value Measurements - Narrative (Details) - USD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Revolving credit facility | Variable-Rate Revolving Credit Facilities Due March 2023 | Line of Credit | Lending Joint Ventures |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Line of credit facility, borrowing capacity increase | $ 75,000,000 |  |  |
Carrying value |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Total debt |  | $ 20,600,000,000 | $ 20,400,000,000 |
Level 2 | Fair Value |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Total debt |  | 19,200,000,000 | 21,800,000,000 |
Lending Solutions Business |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Other (expense) income |  | 12,000,000 | 12,000,000 | $ 13,000,000
Financial Guarantee |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Carrying value of non-contingent liability |  | 520,000,000 |  |
Financial Guarantee | Lending Solutions Business |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Carrying value of non-contingent liability |  | 40,000,000 | $ 10,000,000 |
Financial Guarantee | Lending Joint Ventures | Variable-Rate Revolving Credit Facilities Due March 2023 |  |  |  |
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items] |  |  |  |
Other (expense) income |  | $ 48,000,000 |  |

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