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Fair Value of Financial Instruments (Fair Value of Assets and Liabilities on a Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value $ 296,004 $ 319,919
Liabilities measured at fair value (7,814) (9,505)
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 967 1,167
Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 283,896 307,666
Liabilities measured at fair value (1,797) (3,064)
Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 11,141 11,086
Liabilities measured at fair value (6,017) (6,441)
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 90,561 98,120
Corporate Bonds [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 84,701 92,400
Corporate Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 5,860 5,720
ABS [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 8,929 8,512
ABS [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 7,941 7,642
ABS [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 988 870
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 418 433
U.S. Government Bonds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 396 428
U.S. Government Bonds [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 22 5
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 383 432
Foreign Government Bonds [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 343 391
Foreign Government Bonds [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 40 41
RMBS [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 2,338 2,525
RMBS [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 2,325 2,521
RMBS [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 13 4
CMBS [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 1,592 1,599
CMBS [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 1,575 1,599
CMBS [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 17  
State And Municipal Bonds [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 6,001 6,621
State And Municipal Bonds [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 6,001 6,621
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 473 504
Hybrid And Redeemable Preferred Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 51 54
Hybrid And Redeemable Preferred Securities [Member] | Significant Observable Inputs (Level 2) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 324 357
Hybrid And Redeemable Preferred Securities [Member] | Significant Unobservable Inputs (Level 3) [Member] | Fixed Maturity AFS Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 98 93
Mortgage Loans On Real Estate [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 537 739
Mortgage Loans On Real Estate [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 537 739
Trading Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 4,385 4,482
Trading Securities [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   32
Trading Securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 3,588 3,622
Trading Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 797 828
Equity Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 346 318
Equity Securities [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 14 7
Equity Securities [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 228 216
Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 104 95
Derivative Investments [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 6,498 7,746
Derivative Investments [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 6,226 7,597
Derivative Investments [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 272 149
Other Investments [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 235 154
Other Investments [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 235 154
Invested Cash [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 1,960 2,612
Invested Cash [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 1,960 2,612
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 1,880 1,963
GLB Direct 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 1,880 1,963
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 42 56
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value (174) (182)
GLB Ceded 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 42 56
GLB Ceded Embedded Derivatives [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 (174) (182)
Reinsurance Related Embedded Derivatives [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value   (206)
Reinsurance Related Embedded Derivatives [Member] | Other Assets [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 56  
Reinsurance Related Embedded Derivatives [Member] | Significant Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value   (206)
Reinsurance Related Embedded Derivatives [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 56  
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 493 528
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value (5,574) (6,131)
Indexed Annuity And IUL Contracts [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 493 528
Indexed Annuity And IUL Contracts [Member] | Significant Unobservable Inputs (Level 3) [Member] | Future Contract Benefits [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value (5,574) (6,131)
Separate Account Assets [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Assets measured at fair value 168,877 182,575
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 506 646
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 168,371 181,929
Derivative Liabilities [Member] | Other Liabilities [Member]    
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Liabilities measured at fair value (2,066) (2,986)
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 (1,797) (2,858)
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 $ (269) $ (128)