Disposition of MetLife Poland and Greece - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jul. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment gains (losses)	$ (2,824)	$ (1,260)	$ 1,543
Income (loss) from continuing operations before provision for income tax	$ 2,162	6,364	8,518
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	$ 50