Separate Account Assets Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 141,003	$ 144,634
Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,430	6,265
Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	136	144
Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	848	904
Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,891	1,929
Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	991	1,018
Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,874	9,687
Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,045	4,403
Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,974	5,055
Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	479	550
Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,596	5,388
Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18,079	19,611
Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,337	1,389
Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	367	424
Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	22,238	23,690
Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	47,617	50,502
Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,515	9,706
Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,415	2,586
Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9	9
Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	59,556	62,803
Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	70,476	68,439
Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	122	115
Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,746	1,733
Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	7,976	8,202
Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	155	158
Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	60,477	58,231
Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	135,462	137,507
Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,541	7,127
RIS
Fair Value, Separate Account Investment [Line Items]
Separate account assets	51,012	53,093
RIS | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,536	1,620
RIS | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	135	144
RIS | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	838	893
RIS | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,837	1,882
RIS | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	883	911
RIS | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,682	2,717
RIS | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	702	764
RIS | Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,873	1,920
RIS | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	477	547
RIS | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	557	509
RIS | Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,237	9,673
RIS | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,089	1,077
RIS | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	331	380
RIS | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,427	9,778
RIS | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	20,641	21,417
RIS | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,477	9,671
RIS | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,384	2,557
RIS | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9	9
RIS | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	32,511	33,654
RIS | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	12,356	11,726
RIS | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
RIS | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	748	731
RIS | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,452	2,411
RIS | Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	65	67
RIS | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,091	8,517
RIS | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	46,403	47,000
RIS | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,609	6,093
Asia
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,076	9,187
Asia | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	387	403
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	7	8
Asia | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	44	39
Asia | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	106	105
Asia | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	538	551
Asia | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	54	38
Asia | Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,141	1,190
Asia | Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	243	308
Asia | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	23	31
Asia | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	749	741
Asia | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,156	2,270
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
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18	18
Asia | Separate Account, Debt Security | Redeemable preferred stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Total fixed maturity securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,174	2,288
Asia | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6,005	5,993
Asia | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	122	115
Asia | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	302	269
Asia | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,597	2,661
Asia | Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	20	19
Asia | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,964	2,929
Asia | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,566	8,684
Asia | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	510	503
Latin America
Fair Value, Separate Account Investment [Line Items]
Separate account assets	38,512	41,320
Latin America | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,481	4,212
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	0	0
Latin America | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,283	6,006
Latin America | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,285	3,598
Latin America | Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,070	3,095
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 | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,121	1,051
Latin America | Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,822	9,920
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 | US States and Political Subdivisions Debt Securities [Member]
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	11,638	12,699
Latin America | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	21,581	23,670
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
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	21,581	23,670
Latin America | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	13,080	12,944
Latin America | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	365	392
Latin America | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,206	2,453
Latin America | Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,509	10,099
Latin America | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	38,142	40,826
Latin America | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	370	494
EMEA
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,519	4,327
EMEA | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	26	30
EMEA | Separate Account, Debt Security | Materials
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	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	0	0
EMEA | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	353	398
EMEA | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	20	27
EMEA | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,777	2,638
EMEA | Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
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	373	425
EMEA | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,150	3,063
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
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	3,150	3,063
EMEA | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,295	1,199
EMEA | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	331	341
EMEA | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	721	677
EMEA | Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	70	72
EMEA | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	173	109
EMEA | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,471	4,292
EMEA | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	48	35
MetLife Holdings
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36,623	35,548
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	1	0
MetLife Holdings | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3	3
MetLife Holdings | Separate Account, Debt Security | Consumer
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10	8
MetLife Holdings | Separate Account, Debt Security | Energy
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2	2
MetLife Holdings | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18	15
MetLife Holdings | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4	3
MetLife Holdings | Separate Account, Debt Security | Foreign
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11	13
MetLife Holdings | Separate Account, Debt Security | Technology
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2	3
MetLife Holdings | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Debt Security | U.S. government and agency
Fair Value, Separate Account Investment [Line Items]
Separate account assets	20	18
MetLife Holdings | Separate Account, Debt Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5	4
MetLife Holdings | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	13	13
MetLife Holdings | Separate Account, Debt Security | Total corporate bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	51	47
MetLife Holdings | Separate Account, Debt Security | Total bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	89	82
MetLife Holdings | Separate Account, Debt Security | Mortgage-backed securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	38	35
MetLife Holdings | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations
Fair Value, Separate Account Investment [Line Items]
Separate account assets	13	11
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	140	128
MetLife Holdings | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36,479	35,418
MetLife Holdings | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Equity Security | Public utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Equity Security | Mutual funds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36,479	35,418
MetLife Holdings | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36,619	35,546
MetLife Holdings | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4	2
Group Benefits
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,261	1,159
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 Services Sector
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 | Foreign
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 | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Debt Security | U.S. 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 | US States and Political Subdivisions Debt Securities [Member]
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
Group Benefits | Separate Account, Debt Security | Asset-backed securities and collateralized loan obligations
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
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,261	1,159
Group Benefits | Separate Account, Equity Security | Non-redeemable preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Group Benefits | Separate Account, Equity Security | Public utilities
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	1,261	1,159
Group Benefits | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,261	1,159
Group Benefits | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 0	$ 0