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Investments (Residential Mortgage Loans By Year Of Origination) (Details) - Residential [Member] - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 583 | $ 469
Amount originated in prior year | 533 | 131
Amount originated 2 years prior | 93 | 210
Amount originated 3 years prior | 137 | 109
Amount originated 4 years prior | 67 |
Total | 1,413 | 919
Performing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | 578 | 467
Amount originated in prior year | 527 | 129
Amount originated 2 years prior | 90 | 189
Amount originated 3 years prior | 119 | 104
Amount originated 4 years prior | 65 |
Total | 1,379 | 889
Nonperforming [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | 5 | 2
Amount originated in prior year | 6 | 2
Amount originated 2 years prior | 3 | 21
Amount originated 3 years prior | 18 | 5
Amount originated 4 years prior | 2 |
Total | $ 34 | $ 30

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