Deferred Policy Acquisition Costs, Value of Business Acquired and Unearned Revenue - Unearned Revenue (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	$ 4,537	$ 4,106
Deferrals	418	428
Amortization	(206)	(184)
Effect of foreign currency translation and other - net	(135)	89
Deferred Revenue, Current, Ending Balance	4,614	4,439
RIS
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	31	36
Deferrals	1	1
Amortization	(3)	(4)
Effect of foreign currency translation and other - net	0	0
Deferred Revenue, Current, Ending Balance	29	33
Asia
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	2,850	2,382
Deferrals	285	283
Amortization	(107)	(80)
Effect of foreign currency translation and other - net	(50)	(32)
Deferred Revenue, Current, Ending Balance	2,978	2,553
Latin America
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	989	848
Deferrals	75	70
Amortization	(60)	(58)
Effect of foreign currency translation and other - net	(74)	108
Deferred Revenue, Current, Ending Balance	930	968
EMEA
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	608	559
Deferrals	49	46
Amortization	(34)	(31)
Effect of foreign currency translation and other - net	(11)	13
Deferred Revenue, Current, Ending Balance	612	587
MetLife Holdings
Unearned Revenue [Roll Forward]
Deferred Revenue, Current, Beginning Balance	59	281
Deferrals	8	28
Amortization	(2)	(11)
Effect of foreign currency translation and other - net	0	0
Deferred Revenue, Current, Ending Balance	$ 65	$ 298