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Fair Value of Financial Instruments (Fair Value of Assets and Liabilities on a Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | $ 261,515 | $ 321,912
Liabilities measured at fair value | (10,335) | (15,540)
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 812 | 1,167
Significant Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 252,036 | 309,695
Liabilities measured at fair value | (2,666) | (4,865)
Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 8,667 | 11,050
Liabilities measured at fair value | (7,669) | (10,675)
Corporate bonds | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 79,023 | 98,120
Corporate bonds | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 76,728 | 92,400
Corporate bonds | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,295 | 5,720
ABS [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 10,904 | 8,512
ABS [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 9,787 | 7,642
ABS [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 1,117 | 870
U.S. government bonds | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 379 | 433
U.S. government bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 359 | 428
U.S. government bonds | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 20 | 5
Foreign government bonds | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 318 | 432
Foreign government bonds | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 318 | 391
Foreign government bonds | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 41
RMBS | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,009 | 2,525
RMBS | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,008 | 2,521
RMBS | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 1 | 4
CMBS | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 1,674 | 1,599
CMBS | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 1,674 | 1,599
State and municipal bonds | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 5,070 | 6,621
State and municipal bonds | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 5,035 | 6,621
State and municipal bonds | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 35 |
Hybrid and redeemable preferred securities | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 359 | 469
Hybrid and redeemable preferred securities | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 41 | 54
Hybrid and redeemable preferred securities | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 269 | 322
Hybrid and redeemable preferred securities | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 49 | 93
Mortgage Loans On Real Estate [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 487 | 739
Mortgage Loans On Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 487 | 739
Trading securities [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,498 | 4,460
Trading securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 32
Trading securities [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,917 | 3,600
Trading securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 581 | 828
Available-for-sale equity securities [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 427 | 375
Available-for-sale equity securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 7
Available-for-sale equity securities [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 274 | 273
Available-for-sale equity securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 153 | 95
Derivative investments | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 6,653 | 9,775
Derivative investments | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 6,048 | 9,626
Derivative investments | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 605 | 149
Other investments [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 75 | 154
Other investments [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 75 | 154
Cash and invested cash [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,343 | 2,612
Cash and invested cash [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,343 | 2,612
MRB Assets [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,807 | 1,888
MRB Assets [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed maturity securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,807 | 1,888
MRB Liabilities [Member] | Policyholder Account Balances [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (2,078) | (4,399)
MRB Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Policyholder Account Balances [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (2,078) | (4,399)
Ceded MRBs [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 12 | 95
Ceded MRBs [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (205) | (17)
Ceded MRBs [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 12 | 95
Ceded MRBs [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (205) | (17)
Reinsurance related [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 416 |
Reinsurance related [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value |  | (206)
Reinsurance related [Member] | Significant Observable Inputs (Level 2) [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 416 |
Reinsurance related [Member] | Significant Observable Inputs (Level 2) [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value |  | (206)
Indexed Annuity Contracts Embedded Derivatives [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 525 | 528
Indexed Annuity Contracts Embedded Derivatives [Member] | Policyholder Account Balances [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (4,783) | (6,131)
Indexed Annuity Contracts Embedded Derivatives [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 525 | 528
Indexed Annuity Contracts Embedded Derivatives [Member] | Significant Unobservable Inputs (Level 3) [Member] | Policyholder Account Balances [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (4,783) | (6,131)
Separate Account Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 143,536 |
Separate Account Assets [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 182,575
Separate Account Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 412 |
Separate Account Assets [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 646
Separate Account Assets [Member] | Significant Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 143,124 |
Separate Account Assets [Member] | Significant Observable Inputs (Level 2) [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 181,929
Derivative Liabilities [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (3,269) | (4,787)
Derivative Liabilities [Member] | Significant Observable Inputs (Level 2) [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (2,666) | (4,659)
Derivative Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | $ (603) | $ (128)

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