Separate Account Liabilities Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Separate Account, Liability [Line Items]
Separate account liabilities	$ 143,175	$ 139,504
Latin America | Pension Plan
Separate Account, Liability [Line Items]
Separate account liabilities	43,827	38,765	$ 38,944	$ 41,320
Stable Value and Risk Solutions | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	36,928	40,319	38,689	41,343
Annuities | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	10,967	11,001	11,246	11,659
Annuities | MetLife Holdings
Separate Account, Liability [Line Items]
Separate account liabilities	27,188	27,829	$ 28,843	$ 29,224
Insurance, Other
Separate Account, Liability [Line Items]
Separate account liabilities	$ 24,265	$ 21,590