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Loans Receivable - 2025 Loans Receivable Transactions (Details) - Secured Mortgage Loans $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 01, 2024 USD ($) | Jan. 31, 2025 USD ($) extension_option loan | Oct. 31, 2023 USD ($) | May 31, 2023 USD ($) loan | Apr. 30, 2023 USD ($) loan | Feb. 28, 2023 USD ($) loan | Dec. 31, 2022 USD ($) loan | May 31, 2022 loan | Dec. 31, 2024 USD ($)
Loans Receivable: |  |  |  |  |  |  |  |  |
Outstanding balance | $ 89 |  |  |  |  |  |  |  |
Proceeds from the collection of loans receivable |  |  |  |  |  | $ 102 |  |  |
Other |  |  |  |  |  |  |  |  |
Loans Receivable: |  |  |  |  |  |  |  |  |
Outstanding balance |  |  |  |  |  |  | $ 61 |  | $ 85
Secured loan | loan |  |  |  | 1 | 1 | 1 | 4 | 1 |
Proceeds from the collection of loans receivable |  |  | $ 21 | $ 21 | $ 14 | $ 35 |  |  |
Other | Subsequent Event |  |  |  |  |  |  |  |  |
Loans Receivable: |  |  |  |  |  |  |  |  |
Outstanding balance |  | $ 67 |  |  |  |  |  |  |
Loans receivable, number of extensions | extension_option |  | 1 |  |  |  |  |  |  |
Loan receivable, period of extensions |  | 12 months |  |  |  |  |  |  |
Loans receivable, interest rate |  | 0.08 |  |  |  |  |  |  |
Payments for loans receivable |  | $ 28 |  |  |  |  |  |  |
Secured loan | loan |  | 1 |  |  |  |  |  |  |
Proceeds from the collection of loans receivable |  | $ 15 |  |  |  |  |  |  |
Other | Subsequent Event | Lab |  |  |  |  |  |  |  |  |
Loans Receivable: |  |  |  |  |  |  |  |  |
Outstanding balance |  | $ 75 |  |  |  |  |  |  |

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