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Policyholders' account balances (Policyholder Account Balance Rollforward) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jul. 01, 2023 | Dec. 31, 2020
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Balance – beginning of period |  | $ 2,573 | $ 2,263 | $ 2,165 |  |
Policyholder Account Balance, Acquisition of Cigna |  | 4,014 | 355 |  |  |
Policyholder Account Balance, Premium Received |  | 632 | 333 | 348 |  |
Policyholder Account Balance, Policy Charge | [1] | (142) | (151) | (156) |  |
Policyholder Account Balance, Surrender and Withdrawal |  | (326) | (134) | (117) |  |
Policyholder Account Balance, Benefit Payment | [2] | (132) | (33) | (43) |  |
Policyholder Account Balance, Interest Expense |  | 113 | 47 | 49 |  |
Policyholder Account Balance, Increase (Decrease) from Other Change |  | 57 | 107 | (17) |  |
Balance – end of period |  | 6,789 | 2,573 | 2,263 |  |
Unearned revenue liability |  | 673 | 567 | 503 |  | $ 393
Policyholders' account balances |  | 7,462 | 3,140 | 2,766 |  |
Huatai Group [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholders' account balances |  |  |  |  | $ 4,014 |
Universal Life |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Balance – beginning of period |  | 1,199 | 875 | 813 |  |
Policyholder Account Balance, Premium Received |  | 268 | 232 | 228 |  |
Policyholder Account Balance, Policy Charge | [1] | (132) | (136) | (138) |  |
Policyholder Account Balance, Surrender and Withdrawal |  | (115) | (50) | (51) |  |
Policyholder Account Balance, Benefit Payment | [2] | (12) | (6) | (17) |  |
Policyholder Account Balance, Interest Expense |  | 43 | 27 | 27 |  |
Policyholder Account Balance, Increase (Decrease) from Other Change |  | 23 | 91 | (13) |  |
Balance – end of period |  | 1,876 | 1,199 | 875 |  |
Policyholders' account balances |  | $ 1,876 | $ 1,199 | $ 875 |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 3.00% | 2.50% | 3.40% |  |
Policyholder Account Balance, Net Amount at Risk | [3] | $ 11,828 | $ 11,472 | $ 10,749 |  |
Policyholder Account Balance, Cash Surrender Value |  | 1,628 | 1,001 | 680 |  |
Universal Life | Cigna's Life Insurance Business in Asian Markets |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholder Account Balance, Acquisition of Cigna |  |  | 348 |  |  |
Universal Life | Huatai Group [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholder Account Balance, Acquisition of Cigna |  | 602 |  |  |  |
Annuities [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Balance – beginning of period | [4] | 0 |  |  |  |
Policyholder Account Balance, Premium Received | [4] | 133 |  |  |  |
Policyholder Account Balance, Policy Charge | [1],[4] | 0 |  |  |  |
Policyholder Account Balance, Surrender and Withdrawal | [4] | (19) |  |  |  |
Policyholder Account Balance, Benefit Payment | [2],[4] | (58) |  |  |  |
Policyholder Account Balance, Interest Expense | [4] | 31 |  |  |  |
Policyholder Account Balance, Increase (Decrease) from Other Change | [4] | (1) |  |  |  |
Balance – end of period | [4] | 2,411 | 0 |  |  |
Policyholders' account balances |  | $ 2,411 |  |  |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 2.60% |  |  |  |
Policyholder Account Balance, Net Amount at Risk | [3] | $ 0 |  |  |  |
Policyholder Account Balance, Cash Surrender Value |  | 1,526 |  |  |  |
Annuities [Member] | Huatai Group [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholder Account Balance, Acquisition of Cigna | [4] | 2,325 |  |  |  |
Insurance, Other [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Balance – beginning of period | [5] | 1,374 | 1,388 | 1,352 |  |
Policyholder Account Balance, Premium Received | [5] | 231 | 101 | 120 |  |
Policyholder Account Balance, Policy Charge | [1],[5] | (10) | (15) | (18) |  |
Policyholder Account Balance, Surrender and Withdrawal | [5] | (192) | (84) | (66) |  |
Policyholder Account Balance, Benefit Payment | [2],[5] | (62) | (27) | (26) |  |
Policyholder Account Balance, Interest Expense | [5] | 39 | 20 | 22 |  |
Policyholder Account Balance, Increase (Decrease) from Other Change | [5] | 35 | 16 | (4) |  |
Balance – end of period | [5] | 2,502 | 1,374 | 1,388 |  |
Policyholders' account balances |  | $ 2,502 | $ 1,374 | $ 1,388 |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 1.90% | 1.70% | 1.90% |  |
Policyholder Account Balance, Net Amount at Risk | [3] | $ 559 | $ 182 | $ 180 |  |
Policyholder Account Balance, Cash Surrender Value |  | 2,192 | 1,257 | $ 1,247 |  |
Insurance, Other [Member] | Cigna's Life Insurance Business in Asian Markets |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholder Account Balance, Acquisition of Cigna | [5] |  | $ 7 |  |  |
Insurance, Other [Member] | Huatai Group [Member] |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |
Policyholder Account Balance, Acquisition of Cigna | [5] | $ 1,087 |  |  |  |
[1] | Contracts included in the policyholder account balances are generally charged a premium and/or monthly assessments on the basis of the account balance.
[2] | Includes benefit payments upon maturity as well as death benefits.
[3] | For those guarantees of benefits that are payable in the event of death, the net amount at risk is defined as the current guaranteed minimum death benefit in excess of the current account balance at the balance sheet date.
[4] | Relates to Huatai Life.
[5] | Other primarily comprises policyholder account balances related to investment linked products including endowment and investment contracts, none of which bear significant insurance risk.

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