Deferred Policy Acquisition Costs, Value of Business Acquired and Unearned Revenue - Unearned Revenue (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	$ 4,635	$ 4,537
Deferrals	363	418
Amortization	(222)	(206)
Effect of foreign currency translation and other - net	172	(135)
Deferred Revenue, Current, Ending Balance	4,948	4,614
RIS
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	27	31
Deferrals	1	1
Amortization	(3)	(3)
Effect of foreign currency translation and other - net	0	0
Deferred Revenue, Current, Ending Balance	25	29
Asia
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	3,076	2,850
Deferrals	229	285
Amortization	(124)	(107)
Effect of foreign currency translation and other - net	52	(50)
Deferred Revenue, Current, Ending Balance	3,233	2,978
Latin America
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	841	989
Deferrals	68	75
Amortization	(55)	(60)
Effect of foreign currency translation and other - net	81	(74)
Deferred Revenue, Current, Ending Balance	935	930
EMEA
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	622	608
Deferrals	59	49
Amortization	(37)	(34)
Effect of foreign currency translation and other - net	39	(11)
Deferred Revenue, Current, Ending Balance	683	612
MetLife Holdings
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	69	59
Deferrals	6	8
Amortization	(3)	(2)
Effect of foreign currency translation and other - net	0	0
Deferred Revenue, Current, Ending Balance	$ 72	$ 65