Separate Account Liabilities Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 138,143	$ 139,504
Latin America | Pension Plan
Separate Account, Liability [Line Items]
Separate account liabilities	41,179	38,765	$ 38,512	$ 41,320
Stable Value and Risk Solutions | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	38,141	40,319	39,451	41,343
Annuities | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	11,220	11,001	11,465	11,659
Annuities | MetLife Holdings
Separate Account, Liability [Line Items]
Separate account liabilities	26,296	27,829	$ 29,866	$ 29,224
Insurance, Other
Separate Account, Liability [Line Items]
Separate account liabilities	$ 21,307	$ 21,590