Separate Account Liabilities Rollforward (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 139,504
Balance, end of period	138,143
RIS | Stable Value and Risk Solutions
Separate Account, Liability [Roll Forward]
Balance, beginning of period	40,319	$ 41,343
Premiums and deposits	642	818
Policy charges	(67)	(64)
Surrenders and withdrawals	(2,297)	(1,828)
Benefit payments	(39)	(27)
Investment performance	609	310
Net transfers from (to) general account	1	(19)
Effect of foreign currency translation and other, net (1)	(1,027)	(1,082)
Balance, end of period	38,141	39,451
Cash Surrender Value	34,077	35,132
RIS | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	11,001	11,659
Premiums and deposits	11	15
Policy charges	(5)	(5)
Surrenders and withdrawals	(178)	(172)
Benefit payments	0	0
Investment performance	291	(54)
Net transfers from (to) general account	1	0
Effect of foreign currency translation and other, net (1)	99	22
Balance, end of period	11,220	11,465
Latin America | Pension Plan
Separate Account, Liability [Roll Forward]
Balance, beginning of period	38,765	41,320
Premiums and deposits	1,668	1,702
Policy charges	(69)	(67)
Surrenders and withdrawals	(1,218)	(1,276)
Benefit payments	(427)	(404)
Investment performance	708	1,797
Net transfers from (to) general account	0	0
Effect of foreign currency translation and other, net (1)	1,752	(4,560)
Balance, end of period	41,179	38,512
Cash Surrender Value	41,179	38,512
MetLife Holdings | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	27,829	29,224
Premiums and deposits	61	63
Policy charges	(135)	(144)
Surrenders and withdrawals	(846)	(885)
Benefit payments	(114)	(129)
Investment performance	(459)	1,767
Net transfers from (to) general account	(41)	(27)
Effect of foreign currency translation and other, net (1)	1	(3)
Balance, end of period	26,296	29,866
Cash Surrender Value	$ 26,177	$ 29,719