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Policyholders' Account Balances - Narrative (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |
Policyholder Account Balance | $ 147,018 | $ 135,624 | $ 123,042
Capacity | 2,000 |  |
Medium-term Notes | FANIP |  |  |
Policyholder Account Balance [Line Items] |  |  |
Capacity | 15,000 |  |
Debt Instrument, Face Amount | $ 3,474 | 2,968 | 3,117
Medium-term Notes | FANIP | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 0.00% |  |
Maturities | 3 months |  |
Medium-term Notes | FANIP | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 5.60% |  |
Maturities | 5 years |  |
Commercial paper | FANIP |  |  |
Policyholder Account Balance [Line Items] |  |  |
Capacity | $ 6,000 |  |
Debt Instrument, Face Amount | $ 2,156 | 2,130 | 1,847
Commercial paper | FANIP | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 0.00% |  |
Maturities | 3 months |  |
Commercial paper | FANIP | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 5.60% |  |
Maturities | 5 years |  |
Secured debt | FHLBNY |  |  |
Policyholder Account Balance [Line Items] |  |  |
Debt Instrument, Face Amount | $ 2,628 | 2,628 | 1,050
Secured debt | FHLBNY | Minimum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 1.925% |  |
Maturities | 9 months |  |
Secured debt | FHLBNY | Maximum |  |  |
Policyholder Account Balance [Line Items] |  |  |
Interest Rate | 4.51% |  |
Maturities | 7 years |  |
Institutional Retirement Strategies And Life Planner |  |  |
Policyholder Account Balance [Line Items] |  |  |
Policyholder Account Balance | $ 5,597 | $ 5,064 | $ 4,959

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