FAIR VALUE MEASUREMENTS - Assets and Liabilities at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Assets, at fair value:
AFS fixed maturity securities	$ 61,939,529	$ 68,870,886
Other investments	11,374,656	8,208,566
Asset Management
Liabilities, at fair value
Net amounts presented in the statements of financial condition	11,018	45,003
Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	724,390	1,295,950
Reinsurance Recoverable	27,919,591	25,062,256
Impact of netting	(212,175)	(152,015)
Separate account assets	4,130,794	5,586,428
Liabilities, at fair value
Net amounts presented in the statements of financial condition	934,107	145,163
Funds withheld payable at interest	1,059,820	378,549
Impact of netting	(212,175)	(152,015)
Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	337,860	557,276
Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	1,855,366	1,983,949
U.S. government and agencies
Assets, at fair value:
AFS fixed maturity securities	366,741	784,547
U.S. state, municipal and political subdivisions
Assets, at fair value:
AFS fixed maturity securities	4,410,960	5,109,697
Corporate
Assets, at fair value:
AFS fixed maturity securities	36,316,932	40,932,387
Level III | Asset Management
Liabilities, at fair value
Unfunded Revolver Commitments	137,315
Level III | Insurance
Assets, at fair value:
Funds withheld receivable at interest	12,785
Reinsurance Recoverable	981,775
Liabilities, at fair value
Policy liabilities	394,638
Closed block policy liabilities	1,016,313
Funds withheld payable at interest	(3,487,766)
Level III | Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	337,860
Level III | Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	1,855,366
Level III | Corporate | Insurance
Assets, at fair value:
Trading fixed maturity securities	1,851,939
Level III | Structured securities | Insurance
Assets, at fair value:
Trading fixed maturity securities	93,561
Fair value measured on recurring basis
Assets, at fair value:
Total Assets at Fair Value	167,811,407	168,108,140
Liabilities, at fair value
Total Liabilities at Fair Value	24,037,590	26,455,832
Fair value measured on recurring basis | Asset Management
Assets, at fair value:
Total Investments	81,617,597	73,959,492
Total Assets at Fair Value	82,293,832	74,550,620
Liabilities, at fair value
Securities Sold Short	158,751	249,383
Unfunded Revolver Commitments	137,315	64,276
Total Liabilities at Fair Value	22,987,072	21,949,257
Fair value measured on recurring basis | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	724,390	1,295,950
AFS fixed maturity securities	61,939,529	68,870,886
Trading fixed maturity securities	12,038,847	13,753,573
Equity securities	18,499	289,133
Mortgage and other loan receivables	787,515	832,674
Other investments	4,883,441	1,603,345
Funds withheld receivable at interest	12,785	31,740
Reinsurance Recoverable	981,775	1,293,791
Impact of netting	(212,175)	(152,015)
Separate account assets	4,130,794	5,586,428
Total Assets at Fair Value	85,517,575	93,557,520
Liabilities, at fair value
Net amounts presented in the statements of financial condition	934,107	145,163
Total Liabilities at Fair Value	1,050,518	4,506,575
Policy liabilities	394,638	519,454
Closed block policy liabilities	1,016,313	1,350,224
Funds withheld payable at interest	(3,487,766)	(49,491)
Impact of netting	(212,175)	(152,015)
Fair value measured on recurring basis | Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	337,860	557,276
Fair value measured on recurring basis | Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	1,855,366	1,983,949
Fair value measured on recurring basis | U.S. government and agencies | Insurance
Assets, at fair value:
AFS fixed maturity securities	366,741	784,547
Trading fixed maturity securities	153,637	623,632
Fair value measured on recurring basis | U.S. state, municipal and political subdivisions | Insurance
Assets, at fair value:
AFS fixed maturity securities	4,410,960	5,109,697
Trading fixed maturity securities	705,836	879,463
Fair value measured on recurring basis | Corporate | Insurance
Assets, at fair value:
AFS fixed maturity securities	36,316,932	40,932,387
Trading fixed maturity securities	7,890,377	9,051,947
Fair value measured on recurring basis | Structured securities | Insurance
Assets, at fair value:
AFS fixed maturity securities	20,844,896	22,044,255
Trading fixed maturity securities	3,288,997	3,198,531
Fair value measured on recurring basis | Debt Obligations of Consolidated CFEs | Asset Management
Liabilities, at fair value
Debt Obligations of Consolidated CFEs	22,273,242	21,271,084
Fair value measured on recurring basis | Foreign Exchange Contracts and Options | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	668,716	590,637
Liabilities, at fair value
Net amounts presented in the statements of financial condition	406,746	319,511
Fair value measured on recurring basis | Other Derivatives | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	7,519	491
Liabilities, at fair value
Net amounts presented in the statements of financial condition	11,018	45,003
Fair value measured on recurring basis | Equity market contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	626,391	1,216,843
Liabilities, at fair value
Net amounts presented in the statements of financial condition	91,344	186,754
Fair value measured on recurring basis | Interest rate contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	182,734	198,658
Liabilities, at fair value
Net amounts presented in the statements of financial condition	962,329	101,245
Fair value measured on recurring basis | Foreign currency contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	127,440	32,464
Liabilities, at fair value
Net amounts presented in the statements of financial condition	91,680	7,639
Fair value measured on recurring basis | Credit contracts | Insurance
Liabilities, at fair value
Net amounts presented in the statements of financial condition	929	1,540
Fair value measured on recurring basis | Private Equity | Asset Management
Assets, at fair value:
Total Investments	26,607,688	25,685,750
Fair value measured on recurring basis | Credit | Asset Management
Assets, at fair value:
Total Investments	7,804,392	7,949,573
Fair value measured on recurring basis | Investments of Consolidated CFEs | Asset Management
Assets, at fair value:
Total Investments	22,492,366	22,076,809
Fair value measured on recurring basis | Real Assets | Asset Management
Assets, at fair value:
Total Investments	17,976,366	12,500,749
Fair value measured on recurring basis | Equity Method - Other | Asset Management
Assets, at fair value:
Total Investments	2,943,387	1,601,515
Fair value measured on recurring basis | Other Investments | Asset Management
Assets, at fair value:
Total Investments	3,793,398	4,145,096
Fair value measured on recurring basis | Level I
Assets, at fair value:
Total Assets at Fair Value	6,614,733	10,085,152
Liabilities, at fair value
Total Liabilities at Fair Value	164,057	271,737
Fair value measured on recurring basis | Level I | Asset Management
Assets, at fair value:
Total Investments	2,075,816	3,285,443
Total Assets at Fair Value	2,075,825	3,285,443
Liabilities, at fair value
Securities Sold Short	158,751	249,383
Unfunded Revolver Commitments	0	0
Total Liabilities at Fair Value	158,751	249,383
Fair value measured on recurring basis | Level I | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	28,802	85,394
AFS fixed maturity securities	283,402	500,325
Trading fixed maturity securities	93,697	371,366
Equity securities	2,213	256,196
Mortgage and other loan receivables	0	0
Other investments	0	0
Funds withheld receivable at interest	0	0
Reinsurance Recoverable	0	0
Impact of netting	(7,079)	(25,588)
Separate account assets	4,130,794	5,586,428
Total Assets at Fair Value	4,538,908	6,799,709
Liabilities, at fair value
Net amounts presented in the statements of financial condition	5,306	22,354
Total Liabilities at Fair Value	5,306	22,354
Policy liabilities	0	0
Closed block policy liabilities	0	0
Funds withheld payable at interest	0	0
Impact of netting	(7,079)	(25,588)
Fair value measured on recurring basis | Level I | Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	0	0
Fair value measured on recurring basis | Level I | Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	0	0
Fair value measured on recurring basis | Level I | U.S. government and agencies | Insurance
Assets, at fair value:
AFS fixed maturity securities	283,402	500,325
Trading fixed maturity securities	93,697	371,366
Fair value measured on recurring basis | Level I | U.S. state, municipal and political subdivisions | Insurance
Assets, at fair value:
AFS fixed maturity securities	0	0
Trading fixed maturity securities	0	0
Fair value measured on recurring basis | Level I | Corporate | Insurance
Assets, at fair value:
AFS fixed maturity securities	0	0
Trading fixed maturity securities	0	0
Fair value measured on recurring basis | Level I | Structured securities | Insurance
Assets, at fair value:
AFS fixed maturity securities	0	0
Trading fixed maturity securities	0	0
Fair value measured on recurring basis | Level I | Debt Obligations of Consolidated CFEs | Asset Management
Liabilities, at fair value
Debt Obligations of Consolidated CFEs	0	0
Fair value measured on recurring basis | Level I | Foreign Exchange Contracts and Options | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level I | Other Derivatives | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	9	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level I | Equity market contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	31,025	66,510
Liabilities, at fair value
Net amounts presented in the statements of financial condition	2,692	33,933
Fair value measured on recurring basis | Level I | Interest rate contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	4,856	44,472
Liabilities, at fair value
Net amounts presented in the statements of financial condition	9,693	14,009
Fair value measured on recurring basis | Level I | Foreign currency contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level I | Credit contracts | Insurance
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level I | Private Equity | Asset Management
Assets, at fair value:
Total Investments	1,057,025	2,044,380
Fair value measured on recurring basis | Level I | Credit | Asset Management
Assets, at fair value:
Total Investments	187,504	0
Fair value measured on recurring basis | Level I | Investments of Consolidated CFEs | Asset Management
Assets, at fair value:
Total Investments	0	0
Fair value measured on recurring basis | Level I | Real Assets | Asset Management
Assets, at fair value:
Total Investments	0	0
Fair value measured on recurring basis | Level I | Equity Method - Other | Asset Management
Assets, at fair value:
Total Investments	435,315	482,061
Fair value measured on recurring basis | Level I | Other Investments | Asset Management
Assets, at fair value:
Total Investments	395,972	759,002
Fair value measured on recurring basis | Level II
Assets, at fair value:
Total Assets at Fair Value	90,372,059	99,972,517
Liabilities, at fair value
Total Liabilities at Fair Value	23,619,807	21,758,407
Fair value measured on recurring basis | Level II | Asset Management
Assets, at fair value:
Total Investments	26,444,900	25,881,404
Total Assets at Fair Value	27,121,126	26,472,053
Liabilities, at fair value
Securities Sold Short	0	0
Unfunded Revolver Commitments	0	0
Total Liabilities at Fair Value	22,691,006	21,635,598
Fair value measured on recurring basis | Level II | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	695,588	1,210,556
AFS fixed maturity securities	51,926,029	59,891,500
Trading fixed maturity securities	10,629,316	12,398,408
Equity securities	0	0
Mortgage and other loan receivables	0	0
Other investments	0	0
Funds withheld receivable at interest	0	0
Reinsurance Recoverable	0	0
Impact of netting	(205,096)	(126,427)
Separate account assets	0	0
Total Assets at Fair Value	63,250,933	73,500,464
Liabilities, at fair value
Net amounts presented in the statements of financial condition	928,801	122,809
Total Liabilities at Fair Value	928,801	122,809
Policy liabilities	0	0
Closed block policy liabilities	0	0
Funds withheld payable at interest	0	0
Impact of netting	(205,096)	(126,427)
Fair value measured on recurring basis | Level II | Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	0	0
Fair value measured on recurring basis | Level II | Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	0	0
Fair value measured on recurring basis | Level II | U.S. government and agencies | Insurance
Assets, at fair value:
AFS fixed maturity securities	83,339	284,222
Trading fixed maturity securities	59,940	252,266
Fair value measured on recurring basis | Level II | U.S. state, municipal and political subdivisions | Insurance
Assets, at fair value:
AFS fixed maturity securities	4,410,960	5,109,697
Trading fixed maturity securities	705,836	879,463
Fair value measured on recurring basis | Level II | Corporate | Insurance
Assets, at fair value:
AFS fixed maturity securities	28,006,275	33,281,727
Trading fixed maturity securities	7,218,354	8,486,922
Fair value measured on recurring basis | Level II | Structured securities | Insurance
Assets, at fair value:
AFS fixed maturity securities	19,425,455	21,215,854
Trading fixed maturity securities	2,645,186	2,779,757
Fair value measured on recurring basis | Level II | Debt Obligations of Consolidated CFEs | Asset Management
Liabilities, at fair value
Debt Obligations of Consolidated CFEs	22,273,242	21,271,084
Fair value measured on recurring basis | Level II | Foreign Exchange Contracts and Options | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	668,716	590,637
Liabilities, at fair value
Net amounts presented in the statements of financial condition	406,746	319,511
Fair value measured on recurring basis | Level II | Other Derivatives | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	7,510	12
Liabilities, at fair value
Net amounts presented in the statements of financial condition	11,018	45,003
Fair value measured on recurring basis | Level II | Equity market contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	595,366	1,150,333
Liabilities, at fair value
Net amounts presented in the statements of financial condition	88,652	152,821
Fair value measured on recurring basis | Level II | Interest rate contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	177,878	154,186
Liabilities, at fair value
Net amounts presented in the statements of financial condition	952,636	87,236
Fair value measured on recurring basis | Level II | Foreign currency contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	127,440	32,464
Liabilities, at fair value
Net amounts presented in the statements of financial condition	91,680	7,639
Fair value measured on recurring basis | Level II | Credit contracts | Insurance
Liabilities, at fair value
Net amounts presented in the statements of financial condition	929	1,540
Fair value measured on recurring basis | Level II | Private Equity | Asset Management
Assets, at fair value:
Total Investments	213,706	318,736
Fair value measured on recurring basis | Level II | Credit | Asset Management
Assets, at fair value:
Total Investments	1,830,862	2,122,912
Fair value measured on recurring basis | Level II | Investments of Consolidated CFEs | Asset Management
Assets, at fair value:
Total Investments	22,492,366	22,076,809
Fair value measured on recurring basis | Level II | Real Assets | Asset Management
Assets, at fair value:
Total Investments	961,254	1,111,219
Fair value measured on recurring basis | Level II | Equity Method - Other | Asset Management
Assets, at fair value:
Total Investments	883,652	105,647
Fair value measured on recurring basis | Level II | Other Investments | Asset Management
Assets, at fair value:
Total Investments	63,060	146,081
Fair value measured on recurring basis | Level III
Assets, at fair value:
Total Assets at Fair Value	70,824,615	58,050,471
Liabilities, at fair value
Total Liabilities at Fair Value	253,726	4,425,688
Fair value measured on recurring basis | Level III | Asset Management
Assets, at fair value:
Total Investments	53,096,881	44,792,645
Total Assets at Fair Value	53,096,881	44,793,124
Liabilities, at fair value
Securities Sold Short	0	0
Unfunded Revolver Commitments	137,315	64,276
Total Liabilities at Fair Value	137,315	64,276
Fair value measured on recurring basis | Level III | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
AFS fixed maturity securities	9,730,098	8,479,061
Trading fixed maturity securities	1,315,834	983,799
Equity securities	16,286	32,937
Mortgage and other loan receivables	787,515	832,674
Other investments	4,883,441	1,603,345
Funds withheld receivable at interest	12,785	31,740
Reinsurance Recoverable	981,775	1,293,791
Impact of netting	0	0
Separate account assets	0	0
Total Assets at Fair Value	17,727,734	13,257,347
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Total Liabilities at Fair Value	116,411	4,361,412
Policy liabilities	394,638	519,454
Closed block policy liabilities	1,016,313	1,350,224
Funds withheld payable at interest	(3,487,766)	(49,491)
Impact of netting	0	0
Fair value measured on recurring basis | Level III | Insurance | Indexed universal life
Liabilities, at fair value
Embedded derivative	337,860	557,276
Fair value measured on recurring basis | Level III | Insurance | Fixed-indexed annuity
Liabilities, at fair value
Embedded derivative	1,855,366	1,983,949
Fair value measured on recurring basis | Level III | Insurance | Affiliated Entity
Assets, at fair value:
Mortgage and other loan receivables		27,300
Fair value measured on recurring basis | Level III | U.S. government and agencies | Insurance
Assets, at fair value:
AFS fixed maturity securities	0	0
Trading fixed maturity securities	0	0
Fair value measured on recurring basis | Level III | U.S. state, municipal and political subdivisions | Insurance
Assets, at fair value:
AFS fixed maturity securities	0	0
Trading fixed maturity securities	0	0
Fair value measured on recurring basis | Level III | Corporate | Insurance
Assets, at fair value:
AFS fixed maturity securities	8,310,657	7,650,660
Trading fixed maturity securities	672,023	565,025
Fair value measured on recurring basis | Level III | Structured securities | Insurance
Assets, at fair value:
AFS fixed maturity securities	1,419,441	828,401
Trading fixed maturity securities	643,811	418,774
Fair value measured on recurring basis | Level III | Debt Obligations of Consolidated CFEs | Asset Management
Liabilities, at fair value
Debt Obligations of Consolidated CFEs	0	0
Fair value measured on recurring basis | Level III | Foreign Exchange Contracts and Options | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Other Derivatives | Asset Management
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	479
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Equity market contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Interest rate contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Foreign currency contracts | Insurance
Assets, at fair value:
Net amounts presented in the statements of financial condition	0	0
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Credit contracts | Insurance
Liabilities, at fair value
Net amounts presented in the statements of financial condition	0	0
Fair value measured on recurring basis | Level III | Private Equity | Asset Management
Assets, at fair value:
Total Investments	25,336,957	23,322,634
Fair value measured on recurring basis | Level III | Credit | Asset Management
Assets, at fair value:
Total Investments	5,786,026	5,826,661
Fair value measured on recurring basis | Level III | Investments of Consolidated CFEs | Asset Management
Assets, at fair value:
Total Investments	0	0
Fair value measured on recurring basis | Level III | Real Assets | Asset Management
Assets, at fair value:
Total Investments	17,015,112	11,389,530
Fair value measured on recurring basis | Level III | Equity Method - Other | Asset Management
Assets, at fair value:
Total Investments	1,624,420	1,013,807
Fair value measured on recurring basis | Level III | Other Investments | Asset Management
Assets, at fair value:
Total Investments	3,334,366	3,240,013
Fair value measured on recurring basis | Fair Value Measured at Net Asset Value Per Share | Real Estate and Private Equity Funds | Insurance
Assets, at fair value:
Other investments	$ 148,900	$ 108,700