Disposition of MetLife Poland and Greece - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment gains (losses)		$ (414)	$ (84)	$ (1,617)	$ 1,655
Income (loss) from continuing operations before provision for income tax		$ 419	2,042	1,132	6,820
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			$ 12	$ 19	$ 40