Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock, Common	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjustment	Total MetLife, Inc.'s Stockholders' Equity	Total MetLife, Inc.'s Stockholders' Equity Cumulative Effect, Period of Adoption, Adjustment	Noncontrolling Interests
Beginning Balance at Dec. 31, 2023	$ 30,253	$ (219)	$ 0	$ 12	$ 33,690	$ 40,146	$ (219)	$ (24,591)	$ (19,242)		$ 30,015	$ (219)	$ 238
Treasury stock acquired in connection with share repurchases	(1,183)							(1,183)			(1,183)
Treasury stock acquired in connection with share repurchases, excise tax	11
Stock-based compensation	28				28						28
Dividends on preferred stock	(67)					(67)					(67)
Dividends on common stock	$ (377)					(377)					(377)
Dividend Per Share	$ 0.520
Change in equity of noncontrolling interests	$ 14										0		14
Net income (loss)	875					867					867		8
Other comprehensive income (loss), net of income tax	(528)								(529)		(529)		1
Ending Balance at Mar. 31, 2024	28,796		0	12	33,718	40,350		(25,774)	(19,771)		28,535		261
Beginning Balance at Dec. 31, 2024	27,703	$ (1,074)	0	12	33,791	42,626		(27,798)	(21,186)	$ (1,074)	27,445	$ (1,074)	258
Treasury stock acquired in connection with share repurchases	(1,424)							(1,424)			(1,424)
Treasury stock acquired in connection with share repurchases, excise tax	13
Stock-based compensation	29				29						29
Dividends on preferred stock	(66)					(66)					(66)
Dividends on common stock	$ (374)					(374)					(374)
Dividend Per Share	$ 0.545
Change in equity of noncontrolling interests	$ 1										0		1
Net income (loss)	950					945					945		5
Other comprehensive income (loss), net of income tax	2,010								2,012		2,012		(2)
Ending Balance at Mar. 31, 2025	$ 27,755		$ 0	$ 12	$ 33,820	$ 43,131		$ (29,222)	$ (20,248)		$ 27,493		$ 262