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Market Risk Benefits Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Market Risk Benefit [Line Items]
Asset	$ 392	$ 372
Liability	2,585	2,581
Net	2,193	2,209
Retirement Assurance | Asia
Market Risk Benefit [Line Items]
Asset	0	0
Liability	183	178
Net	183	178	$ 197	$ 203
Investment Product | MetLife Holdings
Market Risk Benefit [Line Items]
Asset	225	231
Liability	2,339	2,300
Net	2,114	2,069
Insurance, Other
Market Risk Benefit [Line Items]
Asset	167	141
Liability	63	103
Net	$ (104)	$ (38)	$ 2	$ (32)

X

- Definition

Amount, before effect of reinsurance and after accumulated increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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