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Policyholder Account Balances - Amounts on Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 219,269	$ 210,597		$ 211,737
Other Products
Policyholder Account Balance [Line Items]
Policyholder account balance	17,226	15,936		19,441
Group Life - Term | Group Benefits
Policyholder Account Balance [Line Items]
Policyholder account balance	7,692	8,028	$ 7,893	7,586	$ 7,586
Capital Markets Investment Products and Stable Value GICs | Retirement and Income Solutions
Policyholder Account Balance [Line Items]
Policyholder account balance	64,140	63,723	62,521	62,908	62,908
Annuities and Risk Solutions | Retirement and Income Solutions
Policyholder Account Balance [Line Items]
Policyholder account balance	17,711	15,549	14,431	13,643	13,643
Universal and Variable Universal Life | Asia
Policyholder Account Balance [Line Items]
Policyholder account balance	49,739	46,417	46,590	43,868	43,868
Fixed Annuity | Asia
Policyholder Account Balance [Line Items]
Policyholder account balance	36,863	32,454	30,976	31,422	31,422
Fixed Annuity | MetLife Holdings
Policyholder Account Balance [Line Items]
Policyholder account balance	11,537	13,286	14,398	15,234	15,234
Variable Annuity | EMEA
Policyholder Account Balance [Line Items]
Policyholder account balance	2,720	2,802	4,215	4,779	4,779
Life and Other | MetLife Holdings
Policyholder Account Balance [Line Items]
Policyholder account balance	$ 11,641	$ 12,402	$ 12,699	$ 12,856	$ 12,856

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount due to policyholder. Includes, but is not limited to, unpaid policy dividend, retrospective refund, and undistributed earnings on participating business. Excludes future policy benefit and claim expense.

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-Topic 944
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