Separate Account Assets Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 145,946	$ 146,038
Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6,170	6,006
Separate Account, Debt Security | Commodities Investment
Fair Value, Separate Account Investment [Line Items]
Separate account assets	195	242
Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,014	1,193
Separate Account, Debt Security | Consumer Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,076	2,400
Separate Account, Debt Security | Energy Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	947	970
Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,865	11,914
Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,765	4,706
Separate Account, Debt Security | Foreign Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,302	6,524
Separate Account, Debt Security | Technology Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	638	720
Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	6,388	4,216
Separate Account, Debt Security | US Government Agencies Debt Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	19,862	20,181
Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	459	549
Separate Account, Debt Security | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	25,802	28,669
Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	53,969	55,083
Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,786	12,360
Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,800	2,968
Separate Account, Debt Security | Redeemable Preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10	4
Separate Account, Debt Security | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	67,565	70,415
Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,458	1,468
Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	66,632	62,805
Separate Account, Equity Security | Non-redeemable Preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	2
Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,350	1,404
Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,242	7,815
Separate Account, Equity Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	160	168
Separate Account, Equity Security | Mutual Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	56,880	53,416
Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	140,367	139,226
Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,579	6,812
U.S.
Fair Value, Separate Account Investment [Line Items]
Separate account assets	55,605	61,030
U.S. | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,859	1,865
U.S. | Separate Account, Debt Security | Commodities Investment
Fair Value, Separate Account Investment [Line Items]
Separate account assets	173	242
U.S. | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,010	1,182
U.S. | Separate Account, Debt Security | Consumer Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,047	2,393
U.S. | Separate Account, Debt Security | Energy Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	846	866
U.S. | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,835	3,538
U.S. | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	794	882
U.S. | Separate Account, Debt Security | Foreign Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,156	2,473
U.S. | Separate Account, Debt Security | Technology Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	618	717
U.S. | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	528	588
U.S. | Separate Account, Debt Security | US Government Agencies Debt Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,193	11,340
U.S. | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	421	504
U.S. | Separate Account, Debt Security | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,479	12,293
U.S. | Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	22,774	25,908
U.S. | Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10,750	12,328
U.S. | Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,771	2,926
U.S. | Separate Account, Debt Security | Redeemable Preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	10	4
U.S. | Separate Account, Debt Security | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36,305	41,166
U.S. | Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,153	1,183
U.S. | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	12,703	11,854
U.S. | Separate Account, Equity Security | Non-redeemable Preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	2
U.S. | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	506	599
U.S. | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,739	2,910
U.S. | Separate Account, Equity Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	74	96
U.S. | Separate Account, Equity Security | Mutual Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,384	8,247
U.S. | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	50,867	54,885
U.S. | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4,738	6,145
Asia
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,714	8,292
Asia | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	348	411
Asia | Separate Account, Debt Security | Commodities Investment
Fair Value, Separate Account Investment [Line Items]
Separate account assets	22	0
Asia | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	8
Asia | Separate Account, Debt Security | Consumer Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	21	0
Asia | Separate Account, Debt Security | Energy Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	99	103
Asia | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	526	527
Asia | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	22	186
Asia | Separate Account, Debt Security | Foreign Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Technology Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	17	0
Asia | Separate Account, Debt Security | Foreign government
Fair Value, Separate Account Investment [Line Items]
Separate account assets	1,179	1,047
Asia | Separate Account, Debt Security | US Government Agencies Debt Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | US States and Political Subdivisions Debt Securities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	25	33
Asia | Separate Account, Debt Security | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	707	824
Asia | Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,212	2,185
Asia | Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18	28
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 | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,230	2,213
Asia | Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	301	281
Asia | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	5,722	5,234
Asia | Separate Account, Equity Security | Non-redeemable Preferred Stock
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Asia | Separate Account, Equity Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	260	270
Asia | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,629	2,330
Asia | Separate Account, Equity Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	19	27
Asia | Separate Account, Equity Security | Mutual Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,814	2,607
Asia | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8,300	7,858
Asia | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	414	434
Latin America
Fair Value, Separate Account Investment [Line Items]
Separate account assets	42,213	39,428
Latin America | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,917	3,687
Latin America | Separate Account, Debt Security | Commodities Investment
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 Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Energy Sector
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	7,080	7,389
Latin America | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,946	3,635
Latin America | Separate Account, Debt Security | Foreign Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,117	4,018
Latin America | Separate Account, Debt Security | Technology Sector
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	2,654	593
Latin America | Separate Account, Debt Security | US Government Agencies Debt Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,651	8,828
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 | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	14,143	15,042
Latin America | Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	26,448	24,463
Latin America | Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
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 | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	26,448	24,463
Latin America | Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
Latin America | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11,801	11,086
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	374	347
Latin America | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,380	2,100
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 Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	9,047	8,639
Latin America | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	42,166	39,236
Latin America | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	47	192
EMEA
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,727	3,314
EMEA | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	46	43
EMEA | Separate Account, Debt Security | Commodities Investment
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 Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Energy Sector
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	409	444
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 Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	17	21
EMEA | Separate Account, Debt Security | Technology Sector
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	2,027	1,988
EMEA | Separate Account, Debt Security | US Government Agencies Debt Securities
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 | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	426	465
EMEA | Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,453	2,453
EMEA | Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
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 | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2,453	2,453
EMEA | Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
EMEA | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	854	783
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	210	188
EMEA | Separate Account, Equity Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	494	475
EMEA | Separate Account, Equity Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	67	45
EMEA | Separate Account, Equity Security | Mutual Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	83	75
EMEA | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3,353	3,279
EMEA | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	374	35
MetLife Holdings
Fair Value, Separate Account Investment [Line Items]
Separate account assets	35,687	33,974
MetLife Holdings | Other invested assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Debt Security | Commodities Investment
Fair Value, Separate Account Investment [Line Items]
Separate account assets	0	0
MetLife Holdings | Separate Account, Debt Security | Communications
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4	3
MetLife Holdings | Separate Account, Debt Security | Consumer Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	8	7
MetLife Holdings | Separate Account, Debt Security | Energy Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	2	1
MetLife Holdings | Separate Account, Debt Security | Financial Services Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	15	16
MetLife Holdings | Separate Account, Debt Security | Commercial and Industrial Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3	3
MetLife Holdings | Separate Account, Debt Security | Foreign Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	12	12
MetLife Holdings | Separate Account, Debt Security | Technology Sector
Fair Value, Separate Account Investment [Line Items]
Separate account assets	3	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 | US Government Agencies Debt Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	18	13
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	12
MetLife Holdings | Separate Account, Debt Security | Corporate Bond Securities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	47	45
MetLife Holdings | Separate Account, Debt Security | Bonds
Fair Value, Separate Account Investment [Line Items]
Separate account assets	82	74
MetLife Holdings | Separate Account, Debt Security | Separate Account, Mortgage-Backed Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	36	32
MetLife Holdings | Separate Account, Debt Security | Asset-Backed Securities, Securitized Loans and Receivables
Fair Value, Separate Account Investment [Line Items]
Separate account assets	11	14
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 | Fixed Maturities [Member]
Fair Value, Separate Account Investment [Line Items]
Separate account assets	129	120
MetLife Holdings | Separate Account, Debt Security | Public Utilities
Fair Value, Separate Account Investment [Line Items]
Separate account assets	4	4
MetLife Holdings | Separate Account, Equity Security
Fair Value, Separate Account Investment [Line Items]
Separate account assets	35,552	33,848
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 Fund
Fair Value, Separate Account Investment [Line Items]
Separate account assets	35,552	33,848
MetLife Holdings | Investments
Fair Value, Separate Account Investment [Line Items]
Separate account assets	35,681	33,968
MetLife Holdings | Other Assets
Fair Value, Separate Account Investment [Line Items]
Separate account assets	$ 6	$ 6