FAIR VALUE MEASUREMENTS (Details - Assets and Liabilities Measured at Fair Value on a Recurring Basis) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	$ 258,505	$ 251,086
Other bond securities	5,437	6,682
Equity securities	679	841
Other invested assets	6,561	6,827
Derivative Assets, Fair Value, Gross	8,698	5,026
Derivative assets, Counterparty netting	(3,977)	(2,427)
Derivative assets, Cash collateral	(3,933)	(1,806)
Derivative assets	788	793
Short-term investments	6,388	5,343
Other assets	899	3,151
Separate account assets, at fair value	88,742	93,272
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,233	6,910
Other policyholder funds	3,447	3,428
Derivative Liabilities, Fair Value, Gross	5,574	4,009
Derivative liabilities, Counterparty netting	(3,977)	(2,427)
Derivative liabilities, Cash collateral	(1,016)	(527)
Derivative liabilities	581	1,055
Fortitude Re funds withheld payable	42,033	0
Other liabilities	581	1,100
Long-term debt	2,181	2,062
Fair Value Using Net Asset Value Per Share or its equivalent	4,989	5,549
Level 1
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable	0
Level 2
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable	0
Level 3
Fair Value, Liabilities Measured on Recurring Basis
Fortitude Re funds withheld payable	37,523
Recurring Basis
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	258,505	251,086
Other bond securities	5,437	6,682
Equity securities	679	841
Other invested assets	1,572	1,278
Derivative assets, Counterparty netting	(3,977)	(2,427)
Derivative assets, Cash collateral	(3,933)	(1,806)
Derivative assets, Counterparty netting and cash collateral	(7,910)	(4,233)
Derivative assets	788	793
Short-term investments	6,388	5,343
Other assets	111	2,358
Separate account assets, at fair value	88,742	93,272
Fair value assets measured on recurring basis, total	362,222	361,653
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,233	6,910
Derivative liabilities, Counterparty netting	(3,977)	(2,427)
Derivative liabilities, Cash collateral	(1,016)	(527)
Derivative liabilities, Counterparty netting and cash collateral	(4,993)	(2,954)
Derivative liabilities	581	1,055
Fortitude Re funds withheld payable	4,510
Other liabilities	0	45
Long-term debt	2,181	2,062
Fair value liabilities measured on recurring basis, total	16,505	10,072
Recurring Basis | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	5,680	3,200
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,615	2,749
Recurring Basis | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,969	1,040
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	663	1,025
Recurring Basis | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,033	769
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	212	139
Recurring Basis | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	3	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	74	89
Recurring Basis | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	13	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	10	7
Recurring Basis | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	4,802	5,380
Other bond securities	1,912	2,121
Recurring Basis | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	15,996	15,318
Recurring Basis | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,608	14,869
Other bond securities	0	0
Recurring Basis | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	156,765	149,636
Other bond securities	11	18
Recurring Basis | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	33,112	32,805
Other bond securities	510	489
Recurring Basis | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,999	14,430
Other bond securities	303	322
Recurring Basis | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	18,223	18,648
Other bond securities	2,701	3,732
Recurring Basis | Level 1
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	44	195
Other bond securities	0	0
Equity securities	624	756
Other invested assets	0	0
Derivative Assets, Fair Value, Gross	10	6
Short-term investments	2,458	2,299
Other assets	0	57
Separate account assets, at fair value	84,629	89,069
Fair value assets measured on recurring basis, total	87,765	92,382
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	33	12
Fortitude Re funds withheld payable	0
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	33	12
Recurring Basis | Level 1 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	2	1
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	3	4
Recurring Basis | Level 1 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 1 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	8	5
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	30	8
Recurring Basis | Level 1 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 1 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 1 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	5	135
Other bond securities	0	0
Recurring Basis | Level 1 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Recurring Basis | Level 1 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	39	60
Other bond securities	0	0
Recurring Basis | Level 1 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Other bond securities	0	0
Recurring Basis | Level 1 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Other bond securities	0	0
Recurring Basis | Level 1 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Other bond securities	0	0
Recurring Basis | Level 1 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Other bond securities	0	0
Recurring Basis | Level 2
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	230,989	224,960
Other bond securities	2,691	2,944
Equity securities	12	77
Other invested assets	86	86
Derivative Assets, Fair Value, Gross	8,585	4,826
Short-term investments	3,930	3,044
Other assets	0	2,212
Separate account assets, at fair value	4,113	4,203
Fair value assets measured on recurring basis, total	250,406	242,352
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	5,450	3,905
Fortitude Re funds withheld payable	0
Other liabilities	0	45
Long-term debt	2,181	2,062
Fair value liabilities measured on recurring basis, total	7,631	6,012
Recurring Basis | Level 2 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	5,678	3,199
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,612	2,745
Recurring Basis | Level 2 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,968	1,034
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	663	1,025
Recurring Basis | Level 2 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	939	593
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	149	111
Recurring Basis | Level 2 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	26	24
Recurring Basis | Level 2 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 2 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	4,797	5,245
Other bond securities	1,912	2,121
Recurring Basis | Level 2 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	13,717	13,197
Recurring Basis | Level 2 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,564	14,809
Other bond securities	0	0
Recurring Basis | Level 2 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	154,865	147,973
Other bond securities	11	18
Recurring Basis | Level 2 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	20,434	19,397
Other bond securities	342	346
Recurring Basis | Level 2 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	13,850	13,377
Other bond securities	256	272
Recurring Basis | Level 2 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	8,762	10,962
Other bond securities	170	187
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	27,472	25,931
Other bond securities	2,746	3,738
Equity securities	43	8
Other invested assets	1,486	1,192
Derivative Assets, Fair Value, Gross	103	194
Short-term investments	0	0
Other assets	111	89
Separate account assets, at fair value	0	0
Fair value assets measured on recurring basis, total	31,961	31,152
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,233	6,910
Derivative Liabilities, Fair Value, Gross	91	92
Fortitude Re funds withheld payable	4,510
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	13,834	7,002
Recurring Basis | Level 3 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	0	0
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 3 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1	6
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	0
Recurring Basis | Level 3 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	86	171
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	33	20
Recurring Basis | Level 3 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	3	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	48	65
Recurring Basis | Level 3 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	13	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	10	7
Recurring Basis | Level 3 | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	0	0
Other bond securities	0	0
Recurring Basis | Level 3 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	2,279	2,121
Recurring Basis | Level 3 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	5	0
Other bond securities	0	0
Recurring Basis | Level 3 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	1,900	1,663
Other bond securities	0	0
Recurring Basis | Level 3 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	12,678	13,408
Other bond securities	168	143
Recurring Basis | Level 3 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	1,149	1,053
Other bond securities	47	50
Recurring Basis | Level 3 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	9,461	7,686
Other bond securities	$ 2,531	$ 3,545