Disposition of MetLife Poland and Greece - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment gains (losses)		$ (685)	$ 1,605	$ (1,203)	$ 1,739
Income (loss) from continuing operations before provision for income tax		(2)	4,487	713	4,778
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		$ 0	$ 13	$ 19	$ 28