FAIR VALUE MEASUREMENTS (Details - Assets and Liabilities Measured at Fair Value on a Recurring Basis) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	$ 265,965	$ 251,086
Other bond securities	5,415	6,682
Equity securities	871	841
Other invested assets	7,064	6,827
Derivative Assets, Fair Value, Gross	7,613	5,026
Derivative assets, Counterparty netting	(3,695)	(2,427)
Derivative assets, Cash collateral	(3,129)	(1,806)
Derivative assets	789	793
Short-term investments	7,214	5,343
Other assets	901	3,151
Separate account assets, at fair value	92,036	93,272
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,322	6,910
Other policyholder funds	3,571	3,428
Derivative Liabilities, Fair Value, Gross	5,355	4,009
Derivative liabilities, Counterparty netting	(3,695)	(2,427)
Derivative liabilities, Cash collateral	(1,060)	(527)
Derivative liabilities	600	1,055
Fortitude Re funds withheld payable	42,543	0
Other liabilities	600	1,100
Long-term debt	2,169	2,062
Fair Value Using Net Asset Value Per Share or its equivalent	5,387	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	37,407
Recurring Basis
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	265,965	251,086
Other bond securities	5,415	6,682
Equity securities	871	841
Other invested assets	1,677	1,278
Derivative assets, Counterparty netting	(3,695)	(2,427)
Derivative assets, Cash collateral	(3,129)	(1,806)
Derivative assets, Counterparty netting and cash collateral	(6,824)	(4,233)
Derivative assets	789	793
Short-term investments	7,214	5,343
Other assets	112	2,358
Separate account assets, at fair value	92,036	93,272
Fair value assets measured on recurring basis, total	374,079	361,653
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,322	6,910
Derivative liabilities, Counterparty netting	(3,695)	(2,427)
Derivative liabilities, Cash collateral	(1,060)	(527)
Derivative liabilities, Counterparty netting and cash collateral	(4,755)	(2,954)
Derivative liabilities	600	1,055
Fortitude Re funds withheld payable	5,136
Other liabilities	0	45
Long-term debt	2,169	2,062
Fair value liabilities measured on recurring basis, total	17,227	10,072
Recurring Basis | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	5,054	3,200
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,559	2,749
Recurring Basis | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,588	1,040
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	619	1,025
Recurring Basis | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	957	769
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	101	139
Recurring Basis | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	69	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	7	7
Recurring Basis | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	5,135	5,380
Other bond securities	1,870	2,121
Recurring Basis | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	16,173	15,318
Recurring Basis | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	15,174	14,869
Other bond securities	0	0
Recurring Basis | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	162,106	149,636
Other bond securities	12	18
Recurring Basis | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	33,414	32,805
Other bond securities	488	489
Recurring Basis | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	15,777	14,430
Other bond securities	322	322
Recurring Basis | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	18,186	18,648
Other bond securities	2,723	3,732
Recurring Basis | Level 1
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	74	195
Other bond securities	0	0
Equity securities	827	756
Other invested assets	0	0
Derivative Assets, Fair Value, Gross	9	6
Short-term investments	3,195	2,299
Other assets	0	57
Separate account assets, at fair value	88,023	89,069
Fair value assets measured on recurring basis, total	92,128	92,382
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	12	12
Fortitude Re funds withheld payable	0
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	12	12
Recurring Basis | Level 1 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	3	1
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	0	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	6	5
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	12	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	33	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	41	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	238,597	224,960
Other bond securities	2,644	2,944
Equity securities	18	77
Other invested assets	94	86
Derivative Assets, Fair Value, Gross	7,477	4,826
Short-term investments	4,019	3,044
Other assets	0	2,212
Separate account assets, at fair value	4,013	4,203
Fair value assets measured on recurring basis, total	256,862	242,352
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	5,286	3,905
Fortitude Re funds withheld payable	0
Other liabilities	0	45
Long-term debt	2,169	2,062
Fair value liabilities measured on recurring basis, total	7,455	6,012
Recurring Basis | Level 2 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	5,051	3,199
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,559	2,745
Recurring Basis | Level 2 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,585	1,034
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	619	1,025
Recurring Basis | Level 2 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	841	593
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	84	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	24	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	5,102	5,245
Other bond securities	1,870	2,121
Recurring Basis | Level 2 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	13,990	13,197
Recurring Basis | Level 2 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	15,126	14,809
Other bond securities	0	0
Recurring Basis | Level 2 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	159,991	147,973
Other bond securities	12	18
Recurring Basis | Level 2 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	20,759	19,397
Other bond securities	320	346
Recurring Basis | Level 2 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,796	13,377
Other bond securities	274	272
Recurring Basis | Level 2 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	8,833	10,962
Other bond securities	168	187
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	27,294	25,931
Other bond securities	2,771	3,738
Equity securities	26	8
Other invested assets	1,583	1,192
Derivative Assets, Fair Value, Gross	127	194
Short-term investments	0	0
Other assets	112	89
Separate account assets, at fair value	0	0
Fair value assets measured on recurring basis, total	31,913	31,152
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	9,322	6,910
Derivative Liabilities, Fair Value, Gross	57	92
Fortitude Re funds withheld payable	5,136
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	14,515	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	3	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	110	171
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	5	20
Recurring Basis | Level 3 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	45	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	7	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	2,183	2,121
Recurring Basis | Level 3 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	7	0
Other bond securities	0	0
Recurring Basis | Level 3 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	2,115	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	12,655	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	981	1,053
Other bond securities	48	50
Recurring Basis | Level 3 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	9,353	7,686
Other bond securities	$ 2,555	$ 3,545