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Investments Investments (Schedule Of Amortized Cost and Fair Value of Available-for-sale Securities and Related OTTI Recognized in AOCI) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | $ 90,493 | $ 85,188 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (14) | (20) | $ 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 3,220 | 5,655 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (591) | (124) |
Available for sale, Fair Value | 93,108 | 90,699 |
US Treasury and Government [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | 2,111 | 2,471 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 | 0 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 109 | 199 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (6) | 0 |
Available for sale, Fair Value | 2,214 | 2,670 |
Foreign |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | 25,156 | 24,594 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (8) | (6) |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 953 | 1,808 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (272) | (42) |
Available for sale, Fair Value | 25,829 | 26,354 |
Corporate securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | 37,844 | 34,095 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (6) | (14) |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,410 | 2,322 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (185) | (72) |
Available for sale, Fair Value | 39,063 | 36,331 |
Collateralized Mortgage Backed Securities [Member] |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | 20,080 | 17,456 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 | 0 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 532 | 1,022 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (123) | (8) |
Available for sale, Fair Value | 20,489 | 18,470 |
States, municipalities, and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fixed maturities available for sale, at amortized cost | 5,302 | 6,572 |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 | 0 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 216 | 304 |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax | (5) | (2) |
Available for sale, Fair Value | $ 5,513 | $ 6,874 |

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