Separate Account Liabilities Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Separate Account, Liability [Line Items]
Separate account liabilities	$ 139,707	$ 144,634
Latin America | Pension Plan
Separate Account, Liability [Line Items]
Separate account liabilities	38,944	41,320	$ 42,213	$ 39,428
Stable Value and Risk Solutions | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	38,689	41,343	42,620	48,265
Annuities | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	11,246	11,659	11,792	11,694
Annuities | MetLife Holdings
Separate Account, Liability [Line Items]
Separate account liabilities	28,843	29,224	$ 29,616	$ 28,499
Insurance, Other
Separate Account, Liability [Line Items]
Separate account liabilities	$ 21,985	$ 21,088