Income Tax (Reconciliation of Income Tax Provision between US Statutory Rate and As Reported for Continuing Operations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income tax expense benefit continuing operations income tax reconciliation
Tax provision at U.S. statutory rate	$ 1,181	$ 454	$ 1,337
Dividend received deduction	(19)	(18)	(20)
Tax-exempt income	(43)	(34)	15
Prior year tax (1), (2)	44	(12)	(15)
Low income housing tax credits	6	(116)	(143)
Other tax credits	(38)	(39)	(44)
Foreign tax rate differential (3), (4), (5)	(22)	(312)	85
Effective Income Tax Rate Reconciliation, Change In Tax Law, Amount	0	(198)	0
Change in valuation allowance (6)	6	187	0
Other, net	(19)	(24)	(17)
Deferred Federal Income Tax Expense (Benefit)	(56)	(591)	1,234
Provision for income tax expense (benefit)	1,178	560	1,062
U.S. tax on global intangible low-taxes income	(5)	(22)	(12)
Tax Year 2021
Income tax expense benefit continuing operations income tax reconciliation
U.S. tax on global intangible low-taxes income			21
Tax Year 2022
Income tax expense benefit continuing operations income tax reconciliation
U.S. tax on global intangible low-taxes income		6	(33)
Tax Year 2023
Income tax expense benefit continuing operations income tax reconciliation
U.S. tax on global intangible low-taxes income	28	(28)
Tax Year 2024
Income tax expense benefit continuing operations income tax reconciliation
U.S. tax on global intangible low-taxes income	(33)
Enactment of Bermuda Corporate Income Tax
Income tax expense benefit continuing operations income tax reconciliation
Change in valuation allowance (6)		198
Provision for income tax expense (benefit)		(198)
MetLife Malaysia
Income tax expense benefit continuing operations income tax reconciliation
Foreign tax rate differential (3), (4), (5)		$ (28)
Settlement with Taxing Authority
Income tax expense benefit continuing operations income tax reconciliation
Prior year tax (1), (2)	$ (57)		$ (32)