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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, 2023 | Dec. 31, 2022
--- | --- | ---
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | $ 270,220 | $ 261,515
Liabilities measured at fair value | (11,857) | (10,335)
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 | 812
Significant Observable Inputs (Level 2) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 260,536 | 252,036
Liabilities measured at fair value | (3,354) | (2,666)
Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 8,872 | 8,667
Liabilities measured at fair value | (8,503) | (7,669)
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 80,448 | 79,023
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 | 78,093 | 76,728
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 | 2,355 | 2,295
ABS [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 11,458 | 10,904
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 | 10,358 | 9,787
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 | 1,100 | 1,117
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 | 383 | 379
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 | 360 | 359
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 | 23 | 20
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 | 309 | 318
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 | 309 | 318
RMBS [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 2,050 | 2,009
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 | 2,049 | 2,008
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 | 1 | 1
CMBS [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 1,671 | 1,674
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 | 1,671 | 1,674
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 | 5,257 | 5,070
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 | 5,221 | 5,035
State And Municipal 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 | 36 | 35
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 | 360 | 359
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 | 45 | 41
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 | 256 | 269
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 | 59 | 49
Mortgage Loans On Real Estate [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 490 | 487
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 | 490 | 487
Trading Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,266 | 3,498
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 | 2,808 | 2,917
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 | 458 | 581
Equity Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 414 | 427
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 | 277 | 274
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 | 137 | 153
Derivative Investments [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 7,726 | 6,653
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 | 7,246 | 6,048
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 | 480 | 605
Other Investments [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 78 | 75
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 | 78 | 75
Invested Cash [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,766 | 3,343
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 | 3,766 | 3,343
MRB Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 2,807
MRB Assets [Member] | Fixed Maturity AFS Securities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 3,445 |
MRB Assets [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value |  | 2,807
MRB Assets [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 | 3,445 |
Ceded MRBs [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 6 | 12
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 | 6 | 12
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (252) | (205)
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 | (252) | (205)
MRB Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (1,976) | (2,078)
MRB Liabilities [Member] | Significant Unobservable Inputs (Level 3) [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (1,976) | (2,078)
Reinsurance Related Embedded Derivatives [Member] | Other Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 367 | 416
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 | 367 | 416
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 | 305 | 525
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 | (5,796) | (4,783)
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 | 305 | 525
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 | (5,796) | (4,783)
Separate Account Assets [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Assets measured at fair value | 148,421 | 143,536
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 | 407 | 412
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 | 148,014 | 143,124
Derivative Liabilities [Member] | Other Liabilities [Member] |  |
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items] |  |
Liabilities measured at fair value | (3,833) | (3,269)
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 | (3,354) | (2,666)
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 | $ (479) | $ (603)

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