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Separate Account Assets Fair Value (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 146,344	$ 139,504
Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,187	4,310
Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	261	246
Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	787	830
Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,756	1,950
Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,086	1,808
Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,458	9,082
Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,267	3,061
Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	619	520
Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	26,257	24,642
Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,286	1,285
Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	335	280
Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	17,234	17,497
Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	45,112	43,704
Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,327	9,059
Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,314	2,162
Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	122	8
Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	55,875	54,933
Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	69,607	63,627
Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11,385	8,707
Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	142,054	131,577
Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,290	7,927
RIS
Fair Value, Separate Account Investment [Line Items]
Separate account assets	48,569	51,420
RIS | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,326	1,398
RIS | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	260	245
RIS | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	750	811
RIS | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,707	1,903
RIS | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	939	958
RIS | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,016	3,472
RIS | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	735	775
RIS | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	585	518
RIS | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,366	9,950
RIS | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,098	1,090
RIS | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	317	250
RIS | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	7,992	8,682
RIS | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18,773	19,972
RIS | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,327	9,021
RIS | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,314	2,145
RIS | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8	8
RIS | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	29,422	31,146
RIS | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11,323	10,035
RIS | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,898	2,830
RIS | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	44,969	45,409
RIS | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,600	6,011
Asia
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,065	8,231
Asia | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	319	312
Asia | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	37	15
Asia | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	43	34
Asia | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	127	113
Asia | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	499	515
Asia | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9	46
Asia | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	34	0
Asia | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,193	1,115
Asia | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	188	188
Asia | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18	18
Asia | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	749	723
Asia | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,148	2,044
Asia | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	114	0
Asia | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,262	2,044
Asia | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,687	3,098
Asia | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,271	2,324
Asia | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,539	7,778
Asia | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	526	453
Latin America
Fair Value, Separate Account Investment [Line Items]
Separate account assets	45,072	38,765
Latin America | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,468	2,557
Latin America | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,005	729
Latin America | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,504	4,760
Latin America | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,521	2,231
Latin America | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11,734	10,545
Latin America | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,030	7,720
Latin America | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	19,764	18,265
Latin America | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	19,764	18,265
Latin America | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18,189	14,295
Latin America | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,514	2,353
Latin America | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	44,935	37,470
Latin America | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	137	1,295
EMEA
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6,541	4,875
EMEA | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	74	43
EMEA | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1	0
EMEA | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6	0
EMEA | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	15	4
EMEA | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	439	309
EMEA | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2	7
EMEA | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,964	3,017
EMEA | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	463	320
EMEA | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,427	3,337
EMEA | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,427	3,337
EMEA | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	311	129
EMEA | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,702	1,200
EMEA | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6,514	4,709
EMEA | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	27	166
MetLife Holdings
Fair Value, Separate Account Investment [Line Items]
Separate account assets	34,672	34,894
MetLife Holdings | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	1
MetLife Holdings | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	4
MetLife Holdings | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	13
MetLife Holdings | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	4
MetLife Holdings | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	26
MetLife Holdings | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	2
MetLife Holdings | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	2
MetLife Holdings | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	15
MetLife Holdings | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	7
MetLife Holdings | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	12
MetLife Holdings | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	52
MetLife Holdings | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	86
MetLife Holdings | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	38
MetLife Holdings | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	17
MetLife Holdings | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	141
MetLife Holdings | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	34,672	34,751
MetLife Holdings | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	34,672	34,892
MetLife Holdings | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	2
Group Benefits
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,425	1,319
Group Benefits | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Financial
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Municipals
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations (collectively, “ABS & CLO”)
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,425	1,319
Group Benefits | Separate Account, Equity Security | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,425	1,319
Group Benefits | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 0	$ 0

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-Topic 944
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