FAIR VALUE MEASUREMENTS (Details - Changes in Level 3 Recurring Fair Value Measurements) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	$ 31,578	$ 30,958
Net Realized and Unrealized Gains (Losses) Included in Income, assets	1,332	1,096
Other Comprehensive Income (Loss), assets	(352)	125
Purchases, Sales, Issuances and Settlements, Net, assets	(56)	(1,561)
Gross Transfers In, assets	1,879	4,289
Gross Transfers Out, assets	(2,692)	(3,291)
Other	(62)
Divested Businesses		(38)
Fair Value End of Period, assets	31,627	31,578
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	661	71
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	1,163	276
Liabilities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	15,721	6,808
Net realized and unrealized gains (losses) included in income, liabilities	(75)	5,222
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	(468)	14
Gross Transfers In, liabilities	0	(1)
Gross Transfers Out, liabilities	(2)	5
Other	0
Divested Businesses		3,673
Fair Value End of Year, liabilities	15,176	15,721
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	4,054	(2,852)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Policyholder contract deposits
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	9,798	6,910
Net realized and unrealized gains (losses) included in income, liabilities	(545)	2,681
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	484	207
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	(55)	0
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	9,682	9,798
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	1,860	(1,515)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Derivative liabilities, net
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	(119)	(102)
Net realized and unrealized gains (losses) included in income, liabilities	(133)	(104)
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	(229)	83
Gross Transfers In, liabilities	0	(1)
Gross Transfers Out, liabilities	53	5
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	(428)	(119)
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	100	40
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Interest rate contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	0	0
Net realized and unrealized gains (losses) included in income, liabilities	(1)	(1)
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	1	1
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	0	0
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	0	0
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	1	2
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Foreign exchange contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	(2)	(6)
Net realized and unrealized gains (losses) included in income, liabilities	0	3
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	1	1
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	0	0
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	(1)	(2)
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	0	1
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Equity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	(151)	(151)
Net realized and unrealized gains (losses) included in income, liabilities	(75)	4
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	(271)	(8)
Gross Transfers In, liabilities	0	(1)
Gross Transfers Out, liabilities	53	5
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	(444)	(151)
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	32	(33)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Credit contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	42	62
Net realized and unrealized gains (losses) included in income, liabilities	9	(47)
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	(21)	27
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	0	0
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	30	42
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	1	8
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Other contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	(8)	(7)
Net realized and unrealized gains (losses) included in income, liabilities	(66)	(63)
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	61	62
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	0	0
Other	0
Divested Businesses		0
Fair Value End of Year, liabilities	(13)	(8)
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	66	62
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Fortitude Re funds withheld payable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, liabilities	6,042	0
Net realized and unrealized gains (losses) included in income, liabilities	603	2,645
Other Comprehensive Income (Loss), liabilities	0	0
Purchases, Sales, Issuances and Settlements, Net, liabilities	(723)	(276)
Gross Transfers In, liabilities	0	0
Gross Transfers Out, liabilities	0	0
Other	0
Divested Businesses		3,673
Fair Value End of Year, liabilities	5,922	6,042
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, liabilities	2,094	(1,377)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, liabilities	0	0
Bonds available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	26,889	25,931
Net Realized and Unrealized Gains (Losses) Included in Income, assets	653	695
Other Comprehensive Income (Loss), assets	(339)	122
Purchases, Sales, Issuances and Settlements, Net, assets	670	(704)
Gross Transfers In, assets	1,732	4,099
Gross Transfers Out, assets	(2,681)	(3,254)
Other	(62)
Divested Businesses		0
Fair Value End of Period, assets	26,862	26,889
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	1,163	276
Bonds available for sale | Obligations of states, municipalities and political subdivisions
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	2,105	2,121
Net Realized and Unrealized Gains (Losses) Included in Income, assets	15	7
Other Comprehensive Income (Loss), assets	(9)	211
Purchases, Sales, Issuances and Settlements, Net, assets	(358)	123
Gross Transfers In, assets	0	27
Gross Transfers Out, assets	(260)	(384)
Other	(62)
Divested Businesses		0
Fair Value End of Period, assets	1,431	2,105
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	254	208
Bonds available for sale | Non-U.S. governments
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	5	0
Net Realized and Unrealized Gains (Losses) Included in Income, assets	0	0
Other Comprehensive Income (Loss), assets	(1)	0
Purchases, Sales, Issuances and Settlements, Net, assets	1	4
Gross Transfers In, assets	5	7
Gross Transfers Out, assets	(3)	(6)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	7	5
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Bonds available for sale | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	2,349	1,663
Net Realized and Unrealized Gains (Losses) Included in Income, assets	(20)	(110)
Other Comprehensive Income (Loss), assets	(31)	65
Purchases, Sales, Issuances and Settlements, Net, assets	188	11
Gross Transfers In, assets	524	1,482
Gross Transfers Out, assets	(369)	(762)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	2,641	2,349
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	(141)	79
Bonds available for sale | Residential mortgage-backed securities (RMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	11,694	13,408
Net Realized and Unrealized Gains (Losses) Included in Income, assets	595	745
Other Comprehensive Income (Loss), assets	(127)	(337)
Purchases, Sales, Issuances and Settlements, Net, assets	(1,163)	(1,200)
Gross Transfers In, assets	8	29
Gross Transfers Out, assets	(629)	(951)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	10,378	11,694
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	790	(172)
Bonds available for sale | Commercial mortgage-backed securities (CMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	922	1,053
Net Realized and Unrealized Gains (Losses) Included in Income, assets	25	18
Other Comprehensive Income (Loss), assets	(49)	60
Purchases, Sales, Issuances and Settlements, Net, assets	414	(1)
Gross Transfers In, assets	57	23
Gross Transfers Out, assets	(179)	(231)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	1,190	922
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	(55)	55
Bonds available for sale | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	9,814	7,686
Net Realized and Unrealized Gains (Losses) Included in Income, assets	38	35
Other Comprehensive Income (Loss), assets	(122)	123
Purchases, Sales, Issuances and Settlements, Net, assets	1,588	359
Gross Transfers In, assets	1,138	2,531
Gross Transfers Out, assets	(1,241)	(920)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	11,215	9,814
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	315	106
Other bond securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	2,698	3,738
Net Realized and Unrealized Gains (Losses) Included in Income, assets	27	302
Other Comprehensive Income (Loss), assets	0	0
Purchases, Sales, Issuances and Settlements, Net, assets	(34)	(1,342)
Gross Transfers In, assets	6	0
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		0
Fair Value End of Period, assets	2,697	2,698
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	41	20
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Other bond securities | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	0
Net Realized and Unrealized Gains (Losses) Included in Income, assets	(1)
Other Comprehensive Income (Loss), assets	0
Purchases, Sales, Issuances and Settlements, Net, assets	135
Gross Transfers In, assets	0
Gross Transfers Out, assets	0
Other	0
Fair Value End of Period, assets	134	0
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	(1)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0
Other bond securities | Residential mortgage-backed securities (RMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	139	143
Net Realized and Unrealized Gains (Losses) Included in Income, assets	3	9
Other Comprehensive Income (Loss), assets	0	0
Purchases, Sales, Issuances and Settlements, Net, assets	54	(13)
Gross Transfers In, assets	0	0
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		0
Fair Value End of Period, assets	196	139
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	(87)	5
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Other bond securities | Commercial mortgage-backed securities (CMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	47	50
Net Realized and Unrealized Gains (Losses) Included in Income, assets	(3)	0
Other Comprehensive Income (Loss), assets	0	0
Purchases, Sales, Issuances and Settlements, Net, assets	(15)	(3)
Gross Transfers In, assets	6	0
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		0
Fair Value End of Period, assets	35	47
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	2	(2)
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Other bond securities | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	2,512	3,545
Net Realized and Unrealized Gains (Losses) Included in Income, assets	28	293
Other Comprehensive Income (Loss), assets	0	0
Purchases, Sales, Issuances and Settlements, Net, assets	(208)	(1,326)
Gross Transfers In, assets	0	0
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		0
Fair Value End of Period, assets	2,332	2,512
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	127	17
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Equity securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	51	8
Net Realized and Unrealized Gains (Losses) Included in Income, assets	11	(1)
Other Comprehensive Income (Loss), assets	1	6
Purchases, Sales, Issuances and Settlements, Net, assets	(123)	35
Gross Transfers In, assets	77	40
Gross Transfers Out, assets	(11)	(37)
Other	0
Divested Businesses		0
Fair Value End of Period, assets	6	51
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	3	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Other invested assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	1,827	1,192
Net Realized and Unrealized Gains (Losses) Included in Income, assets	641	100
Other Comprehensive Income (Loss), assets	(14)	(3)
Purchases, Sales, Issuances and Settlements, Net, assets	(570)	388
Gross Transfers In, assets	64	150
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		0
Fair Value End of Period, assets	1,948	1,827
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	617	51
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	0	0
Other assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Fair Value Beginning of Period, assets	113	89
Net Realized and Unrealized Gains (Losses) Included in Income, assets	0	0
Other Comprehensive Income (Loss), assets	0	0
Purchases, Sales, Issuances and Settlements, Net, assets	1	62
Gross Transfers In, assets	0	0
Gross Transfers Out, assets	0	0
Other	0
Divested Businesses		(38)
Fair Value End of Period, assets	114	113
Changes in Unrealized Gains (Losses) Included in Income on Instruments Held at End of Period, assets	0	0
Changes in Unrealized Gains (Losses) Included in Other Comprehensive Income (Loss) for Recurring Level 3 Instruments Held at End of Period, assets	$ 0	$ 0