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Collateral Finance and Securitization Notes (Narrative) (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2006
Collateral Finance Facility [Line Items] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 850,000,000
Direct investment in subsidiary |  |  |  | $ 113,000,000
Assets Held-in-trust | $ 465,000,000 | $ 572,000,000 |  |
Amount Held In Debt Service Coverage Account | 39,000,000 | 40,000,000 |  |
Collateral Financing Expense | 12,000,000 | 17,000,000 | $ 29,000,000 |
Debt Issuance Cost | 28,000,000 | 24,000,000 |  |
Reinsurance Group Of America Barbados [Member] |  |  |  |
Collateral Finance Facility [Line Items] |  |  |  |
Collateral Financing Expense | 0 | 2,000,000 | 5,000,000 |
Timerberlake Financial [Member] |  |  |  |
Collateral Finance Facility [Line Items] |  |  |  |
Collateral Financing Expense | 1,000,000 | 3,000,000 | 9,000,000 |
Chesterfield Financial Holdings LLC [Member] |  |  |  |
Collateral Finance Facility [Line Items] |  |  |  |
Debt Instrument, Face Amount | 300,000,000 |  |  |
Assets Held-in-trust | 0 | 10,000,000 |  |
Collateral Financing Expense | $ 6,000,000 | $ 7,000,000 | $ 8,000,000 |
Debt Instrument, Interest Rate, Stated Percentage | 4.50% |  |  |

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