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Investments (Summary Of Components Of Net Investment Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | $ 890 | $ 1,208 | $ 681
Funds held interest income (expense) | 2 | 12 | 13
Future policy benefit reserve income (expense) |  | (1) | (1)
Gross investment income | 892 | 1,219 | 692
Investment expenses | (62) | (54) | (50)
Net investment income | 830 | 1,165 | 642
Fixed Maturity Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | 742 | 561 | 542
Equity Securities [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | 16 | 17 | 19
Short Term Investments [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | 28 | 1 | 5
Limited Partnerships [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | 75 | 565 | 113
Other [Member] |  |  |
Schedule of Available-for-sale Securities [Line Items] |  |  |
Gross investment income before adjustments | $ 29 | $ 63 | $ 2

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