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Adoption of ASU 2018-12 (Summary of Changes in Reinsurance Recoverables) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Reinsurance recoverables | $ 19,443 | $ 22,386 |
Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Reinsurance recoverables | (439) | 2,091 |
Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | $ 19,388
Accounting Standards Update 2018-12 [Member] | Other Operations [Member] |  |  |
Reinsurance recoverables |  |  | 790
Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] |  |  |
Reinsurance recoverables |  |  | 3,038
Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member] |  |  |
Reinsurance recoverables |  |  | 607
Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Accumulated Other Comprehensive Income (Loss) [Member] |  |  |
Reinsurance recoverables |  |  | 2,431
Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 2
Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 906
Group Protection Segment [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 162
Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 17,196
Others [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member] |  |  |
Reinsurance recoverables |  |  | 610
Ul and Other [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 332
Ul and Other [Member] | Accounting Standards Update 2018-12 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Retained Earnings [Member] |  |  |
Reinsurance recoverables |  |  | (3)
Swiss Re [Member] |  |  |
Reinsurance recoverables |  | 1,600 |
Swiss Re [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 2,600
Protective [Member] |  |  |
Reinsurance recoverables | 9,400 | 11,500 |
Protective [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 13,200
As Previously Reported [Member] |  |  |
Reinsurance recoverables | 19,882 | 20,295 |
As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables | 19,882 | 20,295 | 16,350
As Previously Reported [Member] | Accounting Standards Update 2018-12 [Member] | Other Operations [Member] |  |  |
Reinsurance recoverables |  |  | 790
As Previously Reported [Member] | Payout Annuities [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 2
As Previously Reported [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 755
As Previously Reported [Member] | Group Protection Segment [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 148
As Previously Reported [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 14,320
As Previously Reported [Member] | Ul and Other [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 335
As Previously Reported [Member] | Swiss Re [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 1,300
As Previously Reported [Member] | Protective [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 12,000
Restatement Adjustments [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables | $ (439) | $ 2,091 |
Single A Discount Rate Measurement in AOCI [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 2,431
Single A Discount Rate Measurement in AOCI [Member] | Traditional Life [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 151
Single A Discount Rate Measurement in AOCI [Member] | Group Protection Segment [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | 14
Single A Discount Rate Measurement in AOCI [Member] | Others [Member] | Accounting Standards Update 2018-12 [Member] |  |  |
Reinsurance recoverables |  |  | $ 2,266

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