Deferred Policy Acquisition Costs, Value of Business Acquired, Unearned Revenue and Other Intangibles - Unearned Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	$ 4,537	$ 4,106	$ 3,625
Deferrals	795	959	856
Amortization	(422)	(385)	(343)
Effect of foreign currency translation and other - net	(275)	(143)	(32)
Deferred Revenue, Current, Ending Balance	4,635	4,537	4,106
RIS
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	31	36	38
Deferrals	2	2	5
Amortization	(6)	(7)	(7)
Effect of foreign currency translation and other - net	0	0	0
Deferred Revenue, Current, Ending Balance	27	31	36
Asia
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	2,850	2,382	2,033
Deferrals	534	667	546
Amortization	(228)	(181)	(144)
Effect of foreign currency translation and other - net	(80)	(18)	(53)
Deferred Revenue, Current, Ending Balance	3,076	2,850	2,382
Latin America
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	989	848	795
Deferrals	146	147	134
Amortization	(115)	(116)	(116)
Effect of foreign currency translation and other - net	(179)	110	35
Deferred Revenue, Current, Ending Balance	841	989	848
EMEA
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	608	559	521
Deferrals	98	95	111
Amortization	(68)	(63)	(59)
Effect of foreign currency translation and other - net	(16)	17	(14)
Deferred Revenue, Current, Ending Balance	622	608	559
MetLife Holdings
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	59	281	238
Deferrals	15	48	60
Amortization	(5)	(18)	(17)
Effect of foreign currency translation and other - net	0	(252)	0
Deferred Revenue, Current, Ending Balance	$ 69	$ 59	$ 281