FAIR VALUE MEASUREMENTS (Details - Assets and Liabilities Measured at Fair Value on a Recurring Basis) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	$ 241,776	$ 251,086
Other bond securities	5,353	6,682
Equity securities	624	841
Other invested assets	6,576	6,827
Derivative Assets, Fair Value, Gross	10,349	5,026
Derivative assets, Counterparty netting	(4,645)	(2,427)
Derivative assets, Cash collateral	(4,840)	(1,806)
Derivative assets	864	793
Short-term investments, portion measured at fair value	8,186	5,343
Other assets	3,311	3,151
Separate account assets, at fair value	78,836	93,272
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	8,153	6,910
Other policyholder funds	3,460	3,428
Derivative Liabilities, Fair Value, Gross	5,429	4,009
Derivative liabilities, Counterparty netting	(4,645)	(2,427)
Derivative liabilities, Cash collateral	(147)	(527)
Derivative liabilities	637	1,055
Other liabilities	637	1,100
Long-term debt	2,276	2,062
Fair Value Using Net Asset Value Per Share or its equivalent	5,029	5,549
Recurring Basis
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	241,776	251,086
Other bond securities	5,353	6,682
Equity securities	624	841
Other invested assets	1,547	1,278
Derivative assets, Counterparty netting	(4,645)	(2,427)
Derivative assets, Cash collateral	(4,840)	(1,806)
Derivative assets, Counterparty netting and cash collateral	(9,485)	(4,233)
Derivative assets	864	793
Short-term investments, portion measured at fair value	8,186	5,343
Other assets	2,447	2,358
Separate account assets, at fair value	78,836	93,272
Fair value assets measured on recurring basis, total	339,633	361,653
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	8,153	6,910
Derivative liabilities, Counterparty netting	(4,645)	(2,427)
Derivative liabilities, Cash collateral	(147)	(527)
Derivative liabilities, Counterparty netting and cash collateral	(4,792)	(2,954)
Derivative liabilities	637	1,055
Other liabilities	0	45
Long-term debt	2,276	2,062
Fair value liabilities measured on recurring basis, total	11,066	10,072
Recurring Basis | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	6,623	3,200
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,226	2,749
Recurring Basis | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	2,338	1,040
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	1,032	1,025
Recurring Basis | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,240	769
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	77	139
Recurring Basis | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	133	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	81	89
Recurring Basis | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	15	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	13	7
Recurring Basis | U.S. government and government sponsored entities
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	5,689	5,380
Other bond securities	2,057	2,121
Recurring Basis | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	15,440	15,318
Recurring Basis | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,173	14,869
Other bond securities	0	0
Recurring Basis | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	144,322	149,636
Other bond securities	16	18
Recurring Basis | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	30,857	32,805
Other bond securities	467	489
Recurring Basis | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,226	14,430
Other bond securities	271	322
Recurring Basis | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	17,069	18,648
Other bond securities	2,542	3,732
Recurring Basis | Level 1
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	287	195
Other bond securities	6	0
Equity securities	582	756
Other invested assets	0	0
Derivative Assets, Fair Value, Gross	89	6
Short-term investments, portion measured at fair value	1,732	2,299
Other assets	176	57
Separate account assets, at fair value	74,591	89,069
Fair value assets measured on recurring basis, total	77,463	92,382
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	10	12
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	10	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	2	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	87	5
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	8	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	239	135
Other bond securities	6	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	48	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	216,565	224,960
Other bond securities	2,778	2,944
Equity securities	23	77
Other invested assets	80	86
Derivative Assets, Fair Value, Gross	9,961	4,826
Short-term investments, portion measured at fair value	6,454	3,044
Other assets	2,180	2,212
Separate account assets, at fair value	4,245	4,203
Fair value assets measured on recurring basis, total	242,286	242,352
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	0	0
Derivative Liabilities, Fair Value, Gross	5,338	3,905
Other liabilities	0	45
Long-term debt	2,276	2,062
Fair value liabilities measured on recurring basis, total	7,614	6,012
Recurring Basis | Level 2 | Interest rate contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	6,621	3,199
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	4,224	2,745
Recurring Basis | Level 2 | Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	2,337	1,034
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	1,028	1,025
Recurring Basis | Level 2 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	1,003	593
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	62	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	5,450	5,245
Other bond securities	2,051	2,121
Recurring Basis | Level 2 | Obligations of states, municipalities and political subdivisions
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	13,338	13,197
Recurring Basis | Level 2 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	14,119	14,809
Other bond securities	0	0
Recurring Basis | Level 2 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	143,107	147,973
Other bond securities	16	18
Recurring Basis | Level 2 | Residential mortgage-backed securities (RMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	19,170	19,397
Other bond securities	318	346
Recurring Basis | Level 2 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	13,080	13,377
Other bond securities	229	272
Recurring Basis | Level 2 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	8,301	10,962
Other bond securities	164	187
Recurring Basis | Level 3
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	24,924	25,931
Other bond securities	2,569	3,738
Equity securities	19	8
Other invested assets	1,467	1,192
Derivative Assets, Fair Value, Gross	299	194
Short-term investments, portion measured at fair value	0	0
Other assets	91	89
Separate account assets, at fair value	0	0
Fair value assets measured on recurring basis, total	29,369	31,152
Fair Value, Liabilities Measured on Recurring Basis
Policyholder contract deposits, portion measured at fair value	8,153	6,910
Derivative Liabilities, Fair Value, Gross	81	92
Other liabilities	0	0
Long-term debt	0	0
Fair value liabilities measured on recurring basis, total	8,234	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	4	0
Recurring Basis | Level 3 | Equity contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	150	171
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	7	20
Recurring Basis | Level 3 | Credit contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	133	3
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	57	65
Recurring Basis | Level 3 | Other contracts
Fair Value, Assets Measured on Recurring Basis
Derivative Assets, Fair Value, Gross	15	14
Fair Value, Liabilities Measured on Recurring Basis
Derivative Liabilities, Fair Value, Gross	13	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	2,102	2,121
Recurring Basis | Level 3 | Non-U.S. governments
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	6	0
Other bond securities	0	0
Recurring Basis | Level 3 | Corporate debt
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	1,215	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	11,687	13,408
Other bond securities	149	143
Recurring Basis | Level 3 | Commercial mortgage-backed securities (CMBS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	1,146	1,053
Other bond securities	42	50
Recurring Basis | Level 3 | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair Value, Assets Measured on Recurring Basis
Bonds available for sale	8,768	7,686
Other bond securities	$ 2,378	$ 3,545