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Investments (Residential Mortgage Loans By Year Of Origination) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year |  | $ 2,520
Amount originated in prior year |  | 1,502
Amount originated 2 years prior |  | 3,105
Amount originated 3 years prior |  | 2,461
Amount originated 4 years prior |  | 1,831
Amount originated 5 or more years prior |  | 5,752
Total |  | 17,171
Residential [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | $ 134 | 469
Amount originated in prior year | 577 | 131
Amount originated 2 years prior | 116 | 210
Amount originated 3 years prior | 187 | 109
Amount originated 4 years prior | 91 |
Total | 1,105 | 919
Performing [Member] | Residential [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year | 134 | 467
Amount originated in prior year | 574 | 129
Amount originated 2 years prior | 113 | 189
Amount originated 3 years prior | 170 | 104
Amount originated 4 years prior | 88 |
Total | 1,079 | 889
Nonperforming [Member] | Residential [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Amount originated in current year |  | 2
Amount originated in prior year | 3 | 2
Amount originated 2 years prior | 3 | 21
Amount originated 3 years prior | 17 | 5
Amount originated 4 years prior | 3 |
Total | $ 26 | $ 30

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