Disposition of MetLife Poland and Greece - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Jul. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment gains (losses)	$ (1,184)	$ (2,824)	$ (1,260)
Income (loss) from continuing operations before provision for income tax	$ 5,622	$ 2,162	6,364
MetLife Poland and Greece
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Agreed upon proceeds from divestiture of business.				$ 738
Dividends Receivable				$ 43
Net investment gains (losses)			(25)
Gain (Loss) on Disposition of Business			(239)
Income (loss) from continuing operations before provision for income tax			$ 19