Separate Account Liabilities Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022
Separate Account, Liability [Line Items]
Separate account liabilities	$ 148,809	$ 144,634
Latin America | Pension Plan
Separate Account, Liability [Line Items]
Separate account liabilities	44,158	41,320	$ 37,473	$ 39,428
Stable Value and Risk Solutions | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	40,448	41,343	40,503	48,265
Annuities | RIS
Separate Account, Liability [Line Items]
Separate account liabilities	11,989	11,659	11,152	11,694
Annuities | MetLife Holdings
Separate Account, Liability [Line Items]
Separate account liabilities	29,349	29,224	$ 27,455	$ 28,499
Insurance, Other
Separate Account, Liability [Line Items]
Separate account liabilities	$ 22,865	$ 21,088