FAIR VALUE OF ASSETS AND LIABILITIES - Assets and Liabilities by Hierarchy Level (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fixed maturity securities
Asset-backed securities	$ 5,239	$ 5,024
Equity securities	182	175
Short-term investments	62	42
Other invested assets	446	450
Deposit asset	608	607
Separate account assets, at fair value	23,985	23,601
Liabilities:
Insurance liabilities, at fair value	5,751	5,546
Other liabilities	762	808
Net modified coinsurance payable	45	0
Separate account liabilities, at fair value	23,985	23,601
Retained Business
Fixed maturity securities
Other invested assets	437	440
Separate account assets, at fair value	21,909	21,558
Liabilities:
Insurance liabilities, at fair value	3,056	2,941
Other liabilities	474	459
Separate account liabilities, at fair value	21,909	21,558
Ceded Business
Fixed maturity securities
Other invested assets	9	10
Separate account assets, at fair value	2,076	2,043
Liabilities:
Insurance liabilities, at fair value	2,695	2,605
Other liabilities	288	349
Separate account liabilities, at fair value	2,076	2,043
Recurring
Fixed maturity securities
Asset-backed securities	5,239	5,024
Equity securities	182	175
Mortgage and other loans	206	196
Short-term investments	62	42
Cash and cash equivalents	845	872
Other invested assets	74	85
Other invested assets, Netting	(198)	(582)
Deposit asset	608	607
Reinsurance recoverables	247	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	7,463	7,254
Separate account assets, at fair value	23,985	23,601
Total assets	31,448	30,855
Liabilities:
Insurance liabilities, at fair value	5,751	5,546
Other liabilities	54	201
Net modified coinsurance payable	45
Separate account liabilities, at fair value	23,985	23,601
Liabilities, Netting	(459)	(875)
Total liabilities	29,835	29,348
Recurring | Retained Business
Fixed maturity securities
Asset-backed securities	3,814	3,616
Mortgage and other loans	206	196
Short-term investments	0	3
Cash and cash equivalents	389	433
Other invested assets	74	85
Other invested assets, Netting	(4)	(347)
Subtotal excluding separate account assets	4,483	4,333
Separate account assets, at fair value	21,909	21,558
Total assets	26,392	25,891
Liabilities:
Insurance liabilities, at fair value	3,056	2,941
Other liabilities	0	0
Separate account liabilities, at fair value	21,909	21,558
Liabilities, Netting	(265)	(602)
Total liabilities	24,965	24,499
Recurring | Ceded Business
Fixed maturity securities
Asset-backed securities	1,425	1,408
Equity securities	182	175
Short-term investments	62	39
Cash and cash equivalents	456	439
Other invested assets	0	0
Other invested assets, Netting	(194)	(235)
Deposit asset	608	607
Reinsurance recoverables	247	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	2,980	2,921
Separate account assets, at fair value	2,076	2,043
Total assets	5,056	4,964
Liabilities:
Insurance liabilities, at fair value	2,695	2,605
Other liabilities	54	201
Separate account liabilities, at fair value	2,076	2,043
Liabilities, Netting	(194)	(272)
Total liabilities	4,870	4,849
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	587	696
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies | Retained Business
Fixed maturity securities
Asset-backed securities	513	582
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies | Ceded Business
Fixed maturity securities
Asset-backed securities	74	114
Recurring | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	175	166
Recurring | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	145	136
Recurring | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities	30	30
Recurring | Foreign government bonds
Fixed maturity securities
Asset-backed securities	5	5
Recurring | Foreign government bonds | Ceded Business
Fixed maturity securities
Asset-backed securities	5	5
Recurring | U.S. corporate public securities
Fixed maturity securities
Asset-backed securities	2,903	2,796
Recurring | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	2,090	2,018
Recurring | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	813	778
Recurring | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	329	290
Recurring | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	182	146
Recurring | U.S. corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	147	144
Recurring | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	217	211
Recurring | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	127	122
Recurring | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	90	89
Recurring | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	69	67
Recurring | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	36	36
Recurring | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	33	31
Recurring | Asset-backed securities
Fixed maturity securities
Asset-backed securities	669	532
Recurring | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	650	513
Recurring | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	19	19
Recurring | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	42	43
Recurring | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	42	43
Recurring | Commercial mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		0
Recurring | Residential mortgage-backed securities
Fixed maturity securities
Asset-backed securities	243	218
Recurring | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	29	20
Recurring | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	214	198
Recurring | Level 1
Fixed maturity securities
Asset-backed securities	0	0
Equity securities	182	175
Mortgage and other loans	0	0
Short-term investments	0	0
Cash and cash equivalents	845	872
Other invested assets	0	46
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	1,027	1,093
Separate account assets, at fair value	0	0
Total assets	1,027	1,093
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	0	0
Net modified coinsurance payable	0
Separate account liabilities, at fair value	0	0
Total liabilities	0	0
Recurring | Level 1 | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Mortgage and other loans	0	0
Short-term investments	0	0
Cash and cash equivalents	389	433
Other invested assets	0	46
Subtotal excluding separate account assets	389	479
Separate account assets, at fair value	0	0
Total assets	389	479
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	0	0
Recurring | Level 1 | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Equity securities	182	175
Short-term investments	0	0
Cash and cash equivalents	456	439
Other invested assets	0	0
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	638	614
Separate account assets, at fair value	0	0
Total assets	638	614
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	0	0
Recurring | Level 1 | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign government bonds
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign government bonds | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate public securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | U.S. corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Asset-backed securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Commercial mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		0
Recurring | Level 1 | Residential mortgage-backed securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 1 | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 2
Fixed maturity securities
Asset-backed securities	4,830	4,687
Equity securities	0	0
Mortgage and other loans	0	0
Short-term investments	62	42
Cash and cash equivalents	0	0
Other invested assets	272	621
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	5,164	5,350
Separate account assets, at fair value	23,985	23,601
Total assets	29,149	28,951
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	513	1,076
Net modified coinsurance payable	0
Separate account liabilities, at fair value	23,985	23,601
Total liabilities	24,498	24,677
Recurring | Level 2 | Retained Business
Fixed maturity securities
Asset-backed securities	3,405	3,279
Mortgage and other loans	0	0
Short-term investments	0	3
Cash and cash equivalents	0	0
Other invested assets	78	386
Subtotal excluding separate account assets	3,483	3,668
Separate account assets, at fair value	21,909	21,558
Total assets	25,392	25,226
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	265	602
Separate account liabilities, at fair value	21,909	21,558
Total liabilities	22,174	22,160
Recurring | Level 2 | Ceded Business
Fixed maturity securities
Asset-backed securities	1,425	1,408
Equity securities	0	0
Short-term investments	62	39
Cash and cash equivalents	0	0
Other invested assets	194	235
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	1,681	1,682
Separate account assets, at fair value	2,076	2,043
Total assets	3,757	3,725
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	248	473
Separate account liabilities, at fair value	2,076	2,043
Total liabilities	2,324	2,516
Recurring | Level 2 | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	587	696
Recurring | Level 2 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Retained Business
Fixed maturity securities
Asset-backed securities	513	582
Recurring | Level 2 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Ceded Business
Fixed maturity securities
Asset-backed securities	74	114
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	175	166
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	145	136
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities	30	30
Recurring | Level 2 | Foreign government bonds
Fixed maturity securities
Asset-backed securities	5	5
Recurring | Level 2 | Foreign government bonds | Ceded Business
Fixed maturity securities
Asset-backed securities	5	5
Recurring | Level 2 | U.S. corporate public securities
Fixed maturity securities
Asset-backed securities	2,903	2,796
Recurring | Level 2 | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	2,090	2,018
Recurring | Level 2 | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	813	778
Recurring | Level 2 | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	147	144
Recurring | Level 2 | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 2 | U.S. corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	147	144
Recurring | Level 2 | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	217	211
Recurring | Level 2 | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	127	122
Recurring | Level 2 | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	90	89
Recurring | Level 2 | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	33	31
Recurring | Level 2 | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 2 | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	33	31
Recurring | Level 2 | Asset-backed securities
Fixed maturity securities
Asset-backed securities	478	377
Recurring | Level 2 | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	459	358
Recurring | Level 2 | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	19	19
Recurring | Level 2 | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	42	43
Recurring | Level 2 | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	42	43
Recurring | Level 2 | Commercial mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		0
Recurring | Level 2 | Residential mortgage-backed securities
Fixed maturity securities
Asset-backed securities	243	218
Recurring | Level 2 | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	29	20
Recurring | Level 2 | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	214	198
Recurring | Level 3
Fixed maturity securities
Asset-backed securities	409	337
Equity securities	0	0
Mortgage and other loans	206	196
Short-term investments	0	0
Cash and cash equivalents	0	0
Other invested assets	0	0
Deposit asset	608	607
Reinsurance recoverables	247	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	1,470	1,393
Separate account assets, at fair value	0	0
Total assets	1,470	1,393
Liabilities:
Insurance liabilities, at fair value	5,751	5,546
Other liabilities	0	0
Net modified coinsurance payable	45
Separate account liabilities, at fair value	0	0
Total liabilities	5,796	5,546
Recurring | Level 3 | Retained Business
Fixed maturity securities
Asset-backed securities	409	337
Mortgage and other loans	206	196
Short-term investments	0	0
Cash and cash equivalents	0	0
Other invested assets	0	0
Subtotal excluding separate account assets	615	533
Separate account assets, at fair value	0	0
Total assets	615	533
Liabilities:
Insurance liabilities, at fair value	3,056	2,941
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	3,056	2,941
Recurring | Level 3 | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Equity securities	0	0
Short-term investments	0	0
Cash and cash equivalents	0	0
Other invested assets	0	0
Deposit asset	608	607
Reinsurance recoverables	247	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	855	860
Separate account assets, at fair value	0	0
Total assets	855	860
Liabilities:
Insurance liabilities, at fair value	2,695	2,605
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	2,740	2,605
Recurring | Level 3 | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S Treasury securities and obligations of U.S. government authorities and agencies | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign government bonds
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign government bonds | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S. corporate public securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	182	146
Recurring | Level 3 | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	182	146
Recurring | Level 3 | U.S. corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	36	36
Recurring | Level 3 | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	36	36
Recurring | Level 3 | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Asset-backed securities
Fixed maturity securities
Asset-backed securities	191	155
Recurring | Level 3 | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	191	155
Recurring | Level 3 | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Commercial mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		0
Recurring | Level 3 | Residential mortgage-backed securities
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Level 3 | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Recurring | Fair Value Measured at Net Asset Value Per Share
Liabilities:
Other invested assets excluded from fair value hierarchy	353	345
Recurring | Fair Value Measured at Net Asset Value Per Share | Retained Business
Liabilities:
Other invested assets excluded from fair value hierarchy	352	344
Recurring | Fair Value Measured at Net Asset Value Per Share | Ceded Business
Liabilities:
Other invested assets excluded from fair value hierarchy	1	1
Policy loans | Recurring
Fixed maturity securities
Other invested assets, Netting	(198)	(582)
Subtotal excluding separate account assets	198	582
Policy loans | Recurring | Retained Business
Fixed maturity securities
Other invested assets, Netting	(4)	(347)
Subtotal excluding separate account assets	4	347
Policy loans | Recurring | Ceded Business
Fixed maturity securities
Other invested assets, Netting	(194)	(235)
Subtotal excluding separate account assets	194	235
Other liabilities - derivatives | Recurring
Liabilities:
Liabilities, Netting	(459)	(875)
Other liabilities - derivatives | Recurring | Retained Business
Liabilities:
Liabilities, Netting	(265)	(602)
Other liabilities - derivatives | Recurring | Ceded Business
Liabilities:
Liabilities, Netting	$ (194)	$ (272)