Separate Account Liabilities Rollforward (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 139,504
Balance, end of period	143,175
RIS | Stable Value and Risk Solutions
Separate Account, Liability [Roll Forward]
Balance, beginning of period	40,319	$ 41,343
Premiums and deposits	1,121	1,053
Policy charges	(140)	(139)
Surrenders and withdrawals	(3,258)	(2,945)
Benefit payments	(82)	(60)
Investment performance	1,416	692
Net transfers from (to) general account	30	(20)
Effect of foreign currency translation and other, net (1)	(2,478)	(1,235)
Balance, end of period	36,928	38,689
Cash Surrender Value	34,285	34,519
RIS | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	11,001	11,659
Premiums and deposits	20	25
Policy charges	(9)	(10)
Surrenders and withdrawals	(383)	(401)
Benefit payments	0	0
Investment performance	454	(95)
Net transfers from (to) general account	(26)	0
Effect of foreign currency translation and other, net (1)	(90)	68
Balance, end of period	10,967	11,246
Latin America | Pension Plan
Separate Account, Liability [Roll Forward]
Balance, beginning of period	38,765	41,320
Premiums and deposits	3,479	3,427
Policy charges	(137)	(132)
Surrenders and withdrawals	(2,565)	(2,652)
Benefit payments	(911)	(812)
Investment performance	2,597	875
Net transfers from (to) general account	0	0
Effect of foreign currency translation and other, net (1)	2,599	(3,082)
Balance, end of period	43,827	38,944
Cash Surrender Value	43,827	38,944
MetLife Holdings | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	27,829	29,224
Premiums and deposits	118	123
Policy charges	(272)	(296)
Surrenders and withdrawals	(1,661)	(1,857)
Benefit payments	(228)	(259)
Investment performance	1,507	1,972
Net transfers from (to) general account	(107)	(59)
Effect of foreign currency translation and other, net (1)	2	(5)
Balance, end of period	27,188	28,843
Cash Surrender Value	$ 27,065	$ 28,706