FAIR VALUE OF ASSETS AND LIABILITIES - Assets and Liabilities by Hierarchy Level (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Fixed maturity securities
Asset-backed securities	$ 4,966	$ 5,024
Equity securities	0	175
Short-term investments	39	42
Other invested assets	640	450
Deposit asset	476	607
Separate account assets, at fair value	24,065	23,601
Liabilities:
Insurance liabilities, at fair value	4,984	5,546
Other liabilities	805	808
Net modified coinsurance payable	81	0
Separate account liabilities, at fair value	24,065	23,601
Retained Business
Fixed maturity securities
Other invested assets	507	440
Separate account assets, at fair value	21,981	21,558
Liabilities:
Insurance liabilities, at fair value	2,711	2,941
Other liabilities	774	459
Net modified coinsurance payable	0
Separate account liabilities, at fair value	21,981	21,558
Ceded Business
Fixed maturity securities
Other invested assets	133	10
Separate account assets, at fair value	2,084	2,043
Liabilities:
Insurance liabilities, at fair value	2,273	2,605
Other liabilities	31	349
Net modified coinsurance payable	81
Separate account liabilities, at fair value	2,084	2,043
Recurring
Fixed maturity securities
Asset-backed securities	4,966	5,024
Equity securities		175
Mortgage and other loans	229	196
Short-term investments	39	42
Cash and cash equivalents	649	872
Other invested assets	279	85
Other invested assets, Netting	(460)	(582)
Deposit asset	476	607
Reinsurance recoverables	200	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	6,838	7,254
Separate account assets, at fair value	24,065	23,601
Total assets	30,903	30,855
Liabilities:
Insurance liabilities, at fair value	4,984	5,546
Other liabilities	0	201
Net modified coinsurance payable	81
Separate account liabilities, at fair value	24,065	23,601
Liabilities, Netting	(759)	(875)
Total liabilities	29,130	29,348
Recurring | Retained Business
Fixed maturity securities
Asset-backed securities	3,749	3,616
Mortgage and other loans	229	196
Short-term investments		3
Cash and cash equivalents	351	433
Other invested assets	156	85
Other invested assets, Netting	(359)	(347)
Subtotal excluding separate account assets	4,485	4,333
Separate account assets, at fair value	21,981	21,558
Total assets	26,466	25,891
Liabilities:
Insurance liabilities, at fair value	2,711	2,941
Other liabilities	0	0
Separate account liabilities, at fair value	21,981	21,558
Liabilities, Netting	(658)	(602)
Total liabilities	24,692	24,499
Recurring | Ceded Business
Fixed maturity securities
Asset-backed securities	1,217	1,408
Equity securities		175
Short-term investments	39	39
Cash and cash equivalents	298	439
Other invested assets	123	0
Other invested assets, Netting	(101)	(235)
Deposit asset	476	607
Reinsurance recoverables	200	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	2,353	2,921
Separate account assets, at fair value	2,084	2,043
Total assets	4,437	4,964
Liabilities:
Insurance liabilities, at fair value	2,273	2,605
Other liabilities	0	201
Separate account liabilities, at fair value	2,084	2,043
Liabilities, Netting	(101)	(272)
Total liabilities	4,438	4,849
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	527	696
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies | Retained Business
Fixed maturity securities
Asset-backed securities	454	582
Recurring | U.S Treasury securities and obligations of U.S. government authorities and agencies | Ceded Business
Fixed maturity securities
Asset-backed securities	73	114
Recurring | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	142	166
Recurring | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	142	136
Recurring | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities		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	2,745	2,796
Recurring | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	2,046	2,018
Recurring | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	699	778
Recurring | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	354	290
Recurring | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	210	146
Recurring | U.S. corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	144	144
Recurring | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	195	211
Recurring | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	138	122
Recurring | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	57	89
Recurring | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	68	67
Recurring | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	34	36
Recurring | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	34	31
Recurring | Asset-backed securities
Fixed maturity securities
Asset-backed securities	680	532
Recurring | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	680	513
Recurring | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		19
Recurring | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	17	43
Recurring | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	17	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	233	218
Recurring | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	28	20
Recurring | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	205	198
Recurring | Level 1
Fixed maturity securities
Asset-backed securities	0	0
Equity securities		175
Mortgage and other loans	0	0
Short-term investments	0	0
Cash and cash equivalents	649	872
Other invested assets	0	46
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	649	1,093
Separate account assets, at fair value	0	0
Total assets	649	1,093
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	57	0
Net modified coinsurance payable	0
Separate account liabilities, at fair value	0	0
Total liabilities	57	0
Recurring | Level 1 | Retained Business
Fixed maturity securities
Asset-backed securities	0	0
Mortgage and other loans	0	0
Short-term investments		0
Cash and cash equivalents	351	433
Other invested assets	0	46
Subtotal excluding separate account assets	351	479
Separate account assets, at fair value	0	0
Total assets	351	479
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	57	0
Separate account liabilities, at fair value	0	0
Total liabilities	57	0
Recurring | Level 1 | Ceded Business
Fixed maturity securities
Asset-backed securities	0	0
Equity securities		175
Short-term investments	0	0
Cash and cash equivalents	298	439
Other invested assets	0	0
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	298	614
Separate account assets, at fair value	0	0
Total assets	298	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
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
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	4,511	4,687
Equity securities		0
Mortgage and other loans	0	0
Short-term investments	39	42
Cash and cash equivalents	0	0
Other invested assets	739	621
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	5,289	5,350
Separate account assets, at fair value	24,065	23,601
Total assets	29,354	28,951
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	702	1,076
Net modified coinsurance payable	0
Separate account liabilities, at fair value	24,065	23,601
Total liabilities	24,767	24,677
Recurring | Level 2 | Retained Business
Fixed maturity securities
Asset-backed securities	3,297	3,279
Mortgage and other loans	0	0
Short-term investments		3
Cash and cash equivalents	0	0
Other invested assets	515	386
Subtotal excluding separate account assets	3,812	3,668
Separate account assets, at fair value	21,981	21,558
Total assets	25,793	25,226
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	601	602
Separate account liabilities, at fair value	21,981	21,558
Total liabilities	22,582	22,160
Recurring | Level 2 | Ceded Business
Fixed maturity securities
Asset-backed securities	1,214	1,408
Equity securities		0
Short-term investments	39	39
Cash and cash equivalents	0	0
Other invested assets	224	235
Deposit asset	0	0
Reinsurance recoverables	0	0
Net modified coinsurance receivable		0
Subtotal excluding separate account assets	1,477	1,682
Separate account assets, at fair value	2,084	2,043
Total assets	3,561	3,725
Liabilities:
Insurance liabilities, at fair value	0	0
Other liabilities	101	473
Separate account liabilities, at fair value	2,084	2,043
Total liabilities	2,185	2,516
Recurring | Level 2 | U.S Treasury securities and obligations of U.S. government authorities and agencies
Fixed maturity securities
Asset-backed securities	527	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	454	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	73	114
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions
Fixed maturity securities
Asset-backed securities	142	166
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions | Retained Business
Fixed maturity securities
Asset-backed securities	142	136
Recurring | Level 2 | Obligations of U.S. states and their political subdivisions | Ceded Business
Fixed maturity securities
Asset-backed securities		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	2,745	2,796
Recurring | Level 2 | U.S. corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	2,046	2,018
Recurring | Level 2 | U.S. corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	699	778
Recurring | Level 2 | U.S. corporate private securities
Fixed maturity securities
Asset-backed securities	144	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	144	144
Recurring | Level 2 | Foreign corporate public securities
Fixed maturity securities
Asset-backed securities	195	211
Recurring | Level 2 | Foreign corporate public securities | Retained Business
Fixed maturity securities
Asset-backed securities	138	122
Recurring | Level 2 | Foreign corporate public securities | Ceded Business
Fixed maturity securities
Asset-backed securities	57	89
Recurring | Level 2 | Foreign corporate private securities
Fixed maturity securities
Asset-backed securities	31	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	31	31
Recurring | Level 2 | Asset-backed securities
Fixed maturity securities
Asset-backed securities	472	377
Recurring | Level 2 | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	472	358
Recurring | Level 2 | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		19
Recurring | Level 2 | Commercial mortgage-backed securities
Fixed maturity securities
Asset-backed securities	17	43
Recurring | Level 2 | Commercial mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	17	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	233	218
Recurring | Level 2 | Residential mortgage-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	28	20
Recurring | Level 2 | Residential mortgage-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities	205	198
Recurring | Level 3
Fixed maturity securities
Asset-backed securities	455	337
Equity securities		0
Mortgage and other loans	229	196
Short-term investments	0	0
Cash and cash equivalents	0	0
Other invested assets	0	0
Deposit asset	476	607
Reinsurance recoverables	200	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	1,360	1,393
Separate account assets, at fair value	0	0
Total assets	1,360	1,393
Liabilities:
Insurance liabilities, at fair value	4,984	5,546
Other liabilities	0	0
Net modified coinsurance payable	81
Separate account liabilities, at fair value	0	0
Total liabilities	5,065	5,546
Recurring | Level 3 | Retained Business
Fixed maturity securities
Asset-backed securities	452	337
Mortgage and other loans	229	196
Short-term investments		0
Cash and cash equivalents	0	0
Other invested assets	0	0
Subtotal excluding separate account assets	681	533
Separate account assets, at fair value	0	0
Total assets	681	533
Liabilities:
Insurance liabilities, at fair value	2,711	2,941
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	2,711	2,941
Recurring | Level 3 | Ceded Business
Fixed maturity securities
Asset-backed securities	3	0
Equity securities		0
Short-term investments	0	0
Cash and cash equivalents	0	0
Other invested assets	0	0
Deposit asset	476	607
Reinsurance recoverables	200	235
Net modified coinsurance receivable		18
Subtotal excluding separate account assets	679	860
Separate account assets, at fair value	0	0
Total assets	679	860
Liabilities:
Insurance liabilities, at fair value	2,273	2,605
Other liabilities	0	0
Separate account liabilities, at fair value	0	0
Total liabilities	2,354	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
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	210	146
Recurring | Level 3 | U.S. corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	210	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	37	36
Recurring | Level 3 | Foreign corporate private securities | Retained Business
Fixed maturity securities
Asset-backed securities	34	36
Recurring | Level 3 | Foreign corporate private securities | Ceded Business
Fixed maturity securities
Asset-backed securities	3	0
Recurring | Level 3 | Asset-backed securities
Fixed maturity securities
Asset-backed securities	208	155
Recurring | Level 3 | Asset-backed securities | Retained Business
Fixed maturity securities
Asset-backed securities	208	155
Recurring | Level 3 | Asset-backed securities | Ceded Business
Fixed maturity securities
Asset-backed securities		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	341	345
Recurring | Fair Value Measured at Net Asset Value Per Share | Retained Business
Liabilities:
Other invested assets excluded from fair value hierarchy	340	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	(460)	(582)
Subtotal excluding separate account assets	460	582
Policy loans | Recurring | Retained Business
Fixed maturity securities
Other invested assets, Netting	(359)	(347)
Subtotal excluding separate account assets	359	347
Policy loans | Recurring | Ceded Business
Fixed maturity securities
Other invested assets, Netting	(101)	(235)
Subtotal excluding separate account assets	101	235
Other liabilities - derivatives | Recurring
Liabilities:
Liabilities, Netting	(759)	(875)
Other liabilities - derivatives | Recurring | Retained Business
Liabilities:
Liabilities, Netting	(658)	(602)
Other liabilities - derivatives | Recurring | Ceded Business
Liabilities:
Liabilities, Netting	$ (101)	$ (272)