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Reinsurance (Schedule Of Assets In Support Of Reserves) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | --- | ---
Ceded Credit Risk [Line Items] |  |  |  |
Fixed maturity AFS securities | $ 118,746 | $ 123,044 |  |
Trading securities | 4,482 | 4,501 |  |
Equity securities | 318 | 129 |  |
Mortgage loans on real estate | 17,991 | 16,763 |  |
Derivative investments | 5,437 | 3,109 |  |
Other investments | 4,292 | 3,984 |  |
Cash and invested cash | 2,612 | 1,708 | $ 2,563 | $ 2,345
Accrued investment income | 1,189 | 1,257 |  |
Other assets | 18,036 | 15,960 |  |
Athene Holding Ltd. [Member] |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |
Fixed maturity AFS securities | 744 | 1,531 |  |
Trading securities | 3,399 | 3,357 |  |
Equity securities | 54 | 17 |  |
Mortgage loans on real estate | 739 | 832 |  |
Derivative investments | 93 | 103 |  |
Other investments | 227 | 167 |  |
Cash and invested cash | 110 | 92 |  |
Accrued investment income | 33 | 42 |  |
Other assets | 5 | 3 |  |
Total | 5,404 | 6,144 |  |
Commercial [Member] |  |  |  |
Ceded Credit Risk [Line Items] |  |  |  |
Mortgage loans on real estate | $ 17,089 | $ 16,043 |  |

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