Consolidated Statements of Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock at Cost	Accumulated Other Comprehensive Income (Loss)	Total MetLife, Inc.'s Stockholders' Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2021	$ 50,013	$ 0	$ 12	$ 33,511	$ 36,831	$ (18,157)	$ (2,451)	$ 49,746	$ 267
Treasury stock acquired in connection with share repurchases	(915)					(915)		(915)
Stock-based compensation	20			20				20
Dividends on preferred stock	(63)				(63)			(63)
Dividends on common stock	$ (397)				(397)			(397)
Dividend Per Share	$ 0.480
Change in equity of noncontrolling interests	$ 1							0	1
Net income (loss)	1,639				1,634			1,634	5
Other comprehensive income (loss), net of income tax	(7,595)						(7,593)	(7,593)	(2)
Ending Balance at Mar. 31, 2022	42,703	0	12	33,531	38,005	(19,072)	(10,044)	42,432	271
Beginning Balance at Dec. 31, 2021	50,013	0	12	33,511	36,831	(18,157)	(2,451)	49,746	267
Treasury stock acquired in connection with share repurchases	(2,000)
Dividends on preferred stock	(92)
Net income (loss)	2,554
Ending Balance at Jun. 30, 2022	34,009	0	12	33,548	38,478	(20,188)	(18,106)	33,744	265
Beginning Balance at Mar. 31, 2022	42,703	0	12	33,531	38,005	(19,072)	(10,044)	42,432	271
Treasury stock acquired in connection with share repurchases	(1,116)					(1,116)		(1,116)
Stock-based compensation	17			17				17
Dividends on preferred stock	(29)				(29)			(29)
Dividends on common stock	$ (408)				(408)			(408)
Dividend Per Share	$ 0.500
Change in equity of noncontrolling interests	$ (10)							0	(10)
Net income (loss)	915				910			910	5
Other comprehensive income (loss), net of income tax	(8,063)						(8,062)	(8,062)	(1)
Ending Balance at Jun. 30, 2022	34,009	0	12	33,548	38,478	(20,188)	(18,106)	33,744	265
Beginning Balance at Dec. 31, 2022	30,125	0	12	33,616	40,332	(21,458)	(22,621)	29,881	244
Treasury stock acquired in connection with share repurchases	(787)					(787)		(787)
Treasury Stock, Value, Acquired, Cost Method, Excise Tax	7
Stock-based compensation	1			1				1
Dividends on preferred stock	(66)				(66)			(66)
Dividends on common stock	$ (389)				(389)			(389)
Dividend Per Share	$ 0.500
Change in equity of noncontrolling interests	$ (2)							0	(2)
Net income (loss)	85				80			80	5
Other comprehensive income (loss), net of income tax	3,456						3,474	3,474	(18)
Ending Balance at Mar. 31, 2023	32,423	0	12	33,617	39,957	(22,245)	(19,147)	32,194	229
Beginning Balance at Dec. 31, 2022	30,125	0	12	33,616	40,332	(21,458)	(22,621)	29,881	244
Treasury Stock, Value, Acquired, Cost Method, Excise Tax	13
Dividends on preferred stock	(98)
Net income (loss)	493
Ending Balance at Jun. 30, 2023	30,492	0	12	33,630	39,928	(22,923)	(20,386)	30,261	231
Beginning Balance at Mar. 31, 2023	32,423	0	12	33,617	39,957	(22,245)	(19,147)	32,194	229
Treasury stock acquired in connection with share repurchases	(678)					(678)		(678)
Treasury Stock, Value, Acquired, Cost Method, Excise Tax	6
Stock-based compensation	13			13				13
Dividends on preferred stock	(32)				(32)			(32)
Dividends on common stock	$ (399)				(399)			(399)
Dividend Per Share	$ 0.520
Change in equity of noncontrolling interests	$ (6)							0	(6)
Net income (loss)	408				402			402	6
Other comprehensive income (loss), net of income tax	(1,237)						(1,239)	(1,239)	2
Ending Balance at Jun. 30, 2023	$ 30,492	$ 0	$ 12	$ 33,630	$ 39,928	$ (22,923)	$ (20,386)	$ 30,261	$ 231