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Investments (Mortgage Loans - Narrative) (Details) - Mortgage Loans - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accrued interest receivable | $ 118 |  | $ 123
Financing receivables in nonaccrual status with no allowance for credit losses | $ 0 |  | $ 0
Minimum | Performing |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivable, before allowance for credit losses by performance status as a percentage of financing receivables, before allowance for credit losses | 99.00% |  | 99.00%
Maximum |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivables in nonaccrual status, investment income | $ 1 | $ 1 |
Residential |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Financing receivables purchased from third parties | $ 161 | $ 32 |

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