Pending Disposition of MetLife Poland and Greece - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Jul. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net investment gains (losses)		$ (518)	$ 134
Income (loss) from continuing operations before provision for income tax		715	291
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)		(32)
Gain (Loss) on Disposition of Business		(246)
Income (loss) from continuing operations before provision for income tax		$ 19	$ 15