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Liability for Future Policy Benefits (Additional Insurance Reserves) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Additional Liability, Long-Duration Insurance [Line Items] |  |  |  |
Balance, including amounts in AOCI, BOP, post-flooring | $ 12,822 | $ 11,934 |  |
Balance, including amounts in AOCI, EOP, post-flooring | 14,439 | 12,822 | $ 11,934 |
Individual Life | Gross Basis |  |  |  |
Additional Liability, Long-Duration Insurance [Line Items] |  |  |  |
Interest accrual | 488 | 435 | 347 |
Gross assessments | $ 2,947 | $ 2,678 | $ 3,018 |
Weighted-average duration of the liability in years (at original discount rate) | 22 years | 23 years | 19 years |
Weighted-average interest rate (at original discount rate) | 3.40% | 3.38% | 3.38% |
Total | Individual Life |  |  |  |
Additional Liability, Long-Duration Insurance [Line Items] |  |  |  |
Balance, including amounts in AOCI, BOP, post-flooring | $ 12,684 | $ 11,708 | $ 10,929 |
Flooring impact and amounts in AOCI | 1,285 | (909) | (1,186) |
Balance, excluding amounts in AOCI, BOP, pre-flooring | 13,969 | 10,799 | 9,743 |
Effect of assumption update |  | 23 | 2,200 | $ (1)
Effect of actual variances from expected experience and other activity |  | 32 | (221) | 55
Adjusted balance, BOP |  | 14,024 | 12,778 | $ 9,797
Assessment collected | 938 | 973 | 858 |
Interest accrual | 488 | 435 | 347 |
Benefits paid | (301) | (217) | (203) |
Other adjustments | 2 | 0 | 0 |
Balance, excluding amounts in AOCI, EOP, pre-flooring | 15,151 | 13,969 | 10,799 |
Flooring impact and amounts in AOCI | (843) | (1,285) | 909 |
Balance, including amounts in AOCI, EOP, post-flooring | 14,308 | 12,684 | 11,708 |
Less: Reinsurance recoverable | 5,852 | 5,075 | 4,623 |
Total balance after reinsurance recoverable | 8,456 | 7,609 | 7,085 |
Other businesses |  |  |  |
Additional Liability, Long-Duration Insurance [Line Items] |  |  |  |
Total balance after reinsurance recoverable | 131 | 138 | 226 |
Total balance |  |  |  |
Additional Liability, Long-Duration Insurance [Line Items] |  |  |  |
Total balance after reinsurance recoverable | $ 8,587 | $ 7,747 | $ 7,311 |

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