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Policyholder Account Balances - Amounts on Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | $ 219,269 | $ 210,597 |  | $ 211,737 |
Other Products |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 17,226 | 15,936 |  | 19,441 |
Group Life - Term | Group Benefits |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 7,692 | 8,028 | $ 7,893 | 7,586 | $ 7,586
Capital Markets Investment Products and Stable Value GICs | Retirement and Income Solutions |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 64,140 | 63,723 | 62,521 | 62,908 | 62,908
Annuities and Risk Solutions | Retirement and Income Solutions |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 17,711 | 15,549 | 14,431 | 13,643 | 13,643
Universal and Variable Universal Life | Asia |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 49,739 | 46,417 | 46,590 | 43,868 | 43,868
Fixed Annuity | Asia |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 36,863 | 32,454 | 30,976 | 31,422 | 31,422
Fixed Annuity | MetLife Holdings |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 11,537 | 13,286 | 14,398 | 15,234 | 15,234
Variable Annuity | EMEA |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | 2,720 | 2,802 | 4,215 | 4,779 | 4,779
Life and Other | MetLife Holdings |  |  |  |  |
Policyholder Account Balance [Line Items] |  |  |  |  |
Policyholder account balance | $ 11,641 | $ 12,402 | $ 12,699 | $ 12,856 | $ 12,856

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