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Investments (Residential Mortgage Loans By Year Of Origination) (Details) - Residential [Member] - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | $ 95 |
2019 | 438 |
2018 | 214 |
Total | 747 | $ 735
Performing [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2020 | 95 |
2019 | 402 |
2018 | 206 |
Total | 703 | 718
Nonperforming [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2019 | 36 |
2018 | 8 |
Total | $ 44 | $ 17

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