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Investments (Reconciliation Of Available-For-Sale Securities From Cost Basis To Fair Value) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | $ 111,707 | $ 105,177 |
Allowance for Credit Losses | 22 | 19 |
Fair Value | 99,736 | 118,746 |
Fixed Maturity AFS Securities [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 111,707 | 105,177 |
Gross unrealized gains | 1,069 | 14,039 |
Gross unrealized losses | 13,018 | 451 |
Allowance for Credit Losses | 22 | 19 | $ 13
Fair Value | 99,736 | 118,746 |
Fixed Maturity AFS Securities [Member] | Corporate Bonds [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 89,249 | 86,373 |
Gross unrealized gains | 787 | 12,113 |
Gross unrealized losses | 11,004 | 349 |
Allowance for Credit Losses | 9 | 17 | 12
Fair Value | 79,023 | 98,120 |
Fixed Maturity AFS Securities [Member] | U.S. Government Bonds [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 405 | 375 |
Gross unrealized gains | 5 | 60 |
Gross unrealized losses | 31 | 2 |
Fair Value | 379 | 433 |
Fixed Maturity AFS Securities [Member] | State And Municipal Bonds [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 5,410 | 5,322 |
Gross unrealized gains | 172 | 1,311 |
Gross unrealized losses | 512 | 12 |
Fair Value | 5,070 | 6,621 |
Fixed Maturity AFS Securities [Member] | Foreign Government Bonds [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 348 | 373 |
Gross unrealized gains | 17 | 64 |
Gross unrealized losses | 47 | 5 |
Fair Value | 318 | 432 |
Fixed Maturity AFS Securities [Member] | RMBS [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 2,216 | 2,334 |
Gross unrealized gains | 22 | 196 |
Gross unrealized losses | 222 | 4 |
Allowance for Credit Losses | 7 | 1 | $ 1
Fair Value | 2,009 | 2,525 |
Fixed Maturity AFS Securities [Member] | CMBS [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 1,917 | 1,552 |
Gross unrealized gains | 3 | 61 |
Gross unrealized losses | 246 | 14 |
Fair Value | 1,674 | 1,599 |
Fixed Maturity AFS Securities [Member] | ABS [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 11,797 | 8,439 |
Gross unrealized gains | 38 | 127 |
Gross unrealized losses | 926 | 54 |
Allowance for Credit Losses | 5 |  |
Fair Value | 10,904 | 8,512 |
Fixed Maturity AFS Securities [Member] | Hybrid And Redeemable Preferred Securities [Member] |  |  |
Amortized cost, gross unrealized gains, losses, OTTI and fair value of AFS securities |  |  |
Amortized Cost | 365 | 409 |
Gross unrealized gains | 25 | 107 |
Gross unrealized losses | 30 | 11 |
Allowance for Credit Losses | 1 | 1 |
Fair Value | $ 359 | $ 504 |

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