Consolidated Statements of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues
Premiums	$ 11,678		$ 11,556		$ 21,267	$ 22,173
Universal life and investment-type product policy fees	1,288		1,372		2,577	2,684
Net investment income	5,072		3,583		9,717	7,867
Other revenues	621		615		1,260	1,275
Net investment gains (losses)	(1,039)		(682)		(1,723)	(1,199)
Net derivative gains (losses)	(997)		(970)		(1,087)	(1,921)
Total revenues	16,623		15,474		32,011	30,879
Expenses
Policyholder benefits and claims	11,809		11,615		21,681	22,789
Policyholder liability remeasurement (gains) losses	(16)		(1)		(25)	(42)
Market risk benefit remeasurement (gains) losses	(817)		(757)		(629)	(2,197)
Interest credited to policyholder account balances	1,933		527		3,797	1,153
Policyholder dividends	151		194		310	393
Other expenses	3,133		2,908		6,190	5,860
Total expenses	16,193		14,486		31,324	27,956
Income (loss) before provision for income tax	430		988		687	2,923
Provision for income tax expense (benefit)	22		73		194	369
Net income (loss)	408	$ 85	915	$ 1,639	493	2,554
Less: Net income (loss) attributable to noncontrolling interests	6		5		11	10
Net income (loss) attributable to MetLife, Inc.	402		910		482	2,544
Less: Preferred stock dividends	32	$ 66	29	$ 63	98	92
Net income (loss) available to MetLife, Inc.’s common shareholders	370		881		384	2,452
Comprehensive income (loss)	(829)		(7,148)		2,712	(13,104)
Less: Comprehensive income (loss) attributable to noncontrolling interests, net of income tax	8		4		(5)	7
Comprehensive income (loss) attributable to MetLife, Inc.	$ (837)		$ (7,152)		$ 2,717	$ (13,111)
Net income (loss) available to MetLife, Inc.’s common shareholders per common share:
Basic	$ 0.48		$ 1.09		$ 0.50	$ 3.00
Diluted	$ 0.48		$ 1.08		$ 0.50	$ 2.98