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Policyholder Account Balances (Account Balances) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Policyholder Account Balance [Line Items] |  |  |  |  |  |  |
Policyholder Account Balance |  | $ 35,681 | $ 23,729 | $ 35,681 | $ 23,729 |  |
Interest credited |  | 547 | 310 | 1,160 | 795 |  |
Policyholder Account Balance, Increase (Decrease) from Other Change |  |  |  | 47 | 76 |  |
Life Insurance Product Line [Member] | Americas [Member] | Other Segments |  |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |  |
Policyholder Account Balance |  | 3,300 | 3,318 | 3,300 | 3,318 | $ 3,273 | $ 1,612
Policyholder Account Balance, Issuance |  |  |  | 330 | 1,779 |  |
Policyholder Account Balance, Policy Charge |  |  |  | (254) | (103) |  |
Policyholder Account Balance, Surrender and Withdrawal |  |  |  | (76) | (11) |  |
Policyholder Account Balance, Benefit Payment |  |  |  | (92) | (91) |  |
Interest credited |  |  |  | 119 | 132 |  |
Policyholder Account Balance Foreign Currency Translation |  |  |  | 0 | 0 |  |
Policyholder Account Balance Reinsurance Recoverable |  | 0 | 0 | 0 | 0 |  |
Policyholder Account Balance After Reinsurance |  | 3,300 | 3,318 | 3,300 | 3,318 |  |
Policyholder Account Balance, Net Amount at Risk | [1] | 25,190 | 34,671 | 25,190 | 34,671 |  |
Policyholder Account Balance, Cash Surrender Value |  | $ 3,295 | $ 3,313 | $ 3,295 | $ 3,313 |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 3.10% | 3.10% | 3.10% | 3.10% |  |
Insurance, Other | Americas [Member] | Other Segments |  |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |  |
Policyholder Account Balance |  | $ 26,018 | $ 16,366 | $ 26,018 | $ 16,366 | 16,432 | 17,838
Policyholder Account Balance, Issuance |  |  |  | 10,974 | 101 |  |
Policyholder Account Balance, Policy Charge |  |  |  | (251) | (61) |  |
Policyholder Account Balance, Surrender and Withdrawal |  |  |  | (1,249) | (1,598) |  |
Policyholder Account Balance, Benefit Payment |  |  |  | (425) | (346) |  |
Interest credited |  |  |  | 537 | 432 |  |
Policyholder Account Balance Foreign Currency Translation |  |  |  | 0 | 0 |  |
Policyholder Account Balance Reinsurance Recoverable |  | (2,653) | (2,844) | (2,653) | (2,844) |  |
Policyholder Account Balance After Reinsurance |  | 23,365 | 13,522 | 23,365 | 13,522 |  |
Policyholder Account Balance, Net Amount at Risk | [1] | 134,062 | 6,614 | 134,062 | 6,614 |  |
Policyholder Account Balance, Cash Surrender Value |  | $ 25,779 | $ 16,262 | $ 25,779 | $ 16,262 |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 3.50% | 3.50% | 3.50% | 3.50% |  |
Insurance, Other | Asia Pacific [Member] | Other Segments |  |  |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |  |  |
Policyholder Account Balance |  | $ 6,316 | $ 3,969 | $ 6,316 | $ 3,969 | $ 4,285 | $ 3,990
Policyholder Account Balance, Issuance |  |  |  | 2,224 | 1,262 |  |
Policyholder Account Balance, Policy Charge |  |  |  | (9) | (137) |  |
Policyholder Account Balance, Surrender and Withdrawal |  |  |  | (144) | (903) |  |
Policyholder Account Balance, Benefit Payment |  |  |  | (233) | (331) |  |
Interest credited |  |  |  | 154 | 84 |  |
Policyholder Account Balance Foreign Currency Translation |  |  |  | 39 | 4 |  |
Policyholder Account Balance Reinsurance Recoverable |  | 0 | 0 | 0 | 0 |  |
Policyholder Account Balance After Reinsurance |  | 6,316 | 3,969 | 6,316 | 3,969 |  |
Policyholder Account Balance, Net Amount at Risk | [1] | 0 | 13 | 0 | 13 |  |
Policyholder Account Balance, Cash Surrender Value |  | $ 5,948 | $ 3,618 | $ 5,948 | $ 3,618 |  |
Policyholder Account Balance, Weighted Average Crediting Rate |  | 4.20% | 3.70% | 4.20% | 3.70% |  |
[1] | Net amount at risk is defined as the guaranteed amount less the account value as of the balance sheet date. The balance represents the amount of the claim the Company would incur if death claims were filed on all contracts on the balance sheet date.

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- Definition Amount of cash to be paid to policyholder upon termination and surrender of long-duration contract issued by insurance entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (b)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480081/944-40-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 944 -SubTopic 40 -Name Accounting Standards Codification -Section 55 -Paragraph 29F -Publisher FASB -URI https://asc.fasb.org/1943274/2147480046/944-40-55-29F + Details
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