Separate Account Liabilities Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Separate Account, Liability [Roll Forward]
Balance, beginning of period	$ 144,634
Balance, end of period	139,504	$ 144,634
RIS | Stable Value and Risk Solutions
Separate Account, Liability [Roll Forward]
Balance, beginning of period	41,343	48,265	$ 58,473
Premiums and deposits	3,065	2,203	5,253
Policy charges	(273)	(285)	(309)
Surrenders and withdrawals	(5,423)	(11,123)	(5,885)
Benefit payments	(99)	(99)	(125)
Investment performance	1,755	2,595	(4,503)
Net transfers from (to) general account	(4)	(56)	82
Effect of foreign currency translation and other, net (1)	(45)	(157)	(4,721)
Balance, end of period	40,319	41,343	48,265
Cash Surrender Value	34,949	35,950	42,728
RIS | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	11,659	11,694	21,292
Premiums and deposits	145	175	1,233
Policy charges	(21)	(21)	(25)
Surrenders and withdrawals	(918)	(944)	(7,481)
Benefit payments	0	0	0
Investment performance	83	774	(2,823)
Net transfers from (to) general account	0	3	(56)
Effect of foreign currency translation and other, net (1)	53	(22)	(446)
Balance, end of period	11,001	11,659	11,694
Latin America | Pension Plan
Separate Account, Liability [Roll Forward]
Balance, beginning of period	41,320	39,428	37,631
Premiums and deposits	6,779	7,936	7,058
Policy charges	(264)	(287)	(253)
Surrenders and withdrawals	(5,147)	(5,781)	(5,155)
Benefit payments	(1,679)	(1,702)	(1,559)
Investment performance	2,981	2,814	1,490
Net transfers from (to) general account	0	0	0
Effect of foreign currency translation and other, net (1)	(5,225)	(1,088)	216
Balance, end of period	38,765	41,320	39,428
Cash Surrender Value	38,765	41,320	39,428
MetLife Holdings | Annuities
Separate Account, Liability [Roll Forward]
Balance, beginning of period	29,224	28,499	40,173
Premiums and deposits	235	256	267
Policy charges	(603)	(609)	(665)
Surrenders and withdrawals	(3,794)	(2,948)	(2,911)
Benefit payments	(491)	(464)	(431)
Investment performance	3,411	4,561	(7,738)
Net transfers from (to) general account	(147)	(74)	(199)
Effect of foreign currency translation and other, net (1)	(6)	3	3
Balance, end of period	27,829	29,224	28,499
Cash Surrender Value	$ 27,703	$ 29,078	$ 28,348