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Separate Account Liabilities Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 146,344	$ 139,504
Latin America | Pension Plan
Separate Account, Liability [Line Items]
Separate account liabilities	45,072	38,765	$ 44,158	$ 41,320
Stable Value and Risk Solutions | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	37,217	40,319	40,448	41,343
Annuities | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	11,247	11,001	11,989	11,659
Annuities | MetLife Holdings
Separate Account, Liability [Line Items]
Separate account liabilities	27,355	27,829	$ 29,349	$ 29,224
Insurance, Other
Separate Account, Liability [Line Items]
Separate account liabilities	$ 25,453	$ 21,590

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