FAIR VALUE MEASUREMENTS (Details - Changes in Level 3 Recurring Fair Value Measurements) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	$ 35,000	$ 35,673	$ 35,763	$ 37,666
Net Realized and Unrealized Gains (Losses) Included in Income	307	505	678	1,031
Other Comprehensive Income (Loss)	(51)	575	(211)	767
Purchases, Sales, Issues and Settlements, Net	(1,275)	(684)	(2,685)	(2,504)
Gross Transfers in, assets	58	78	624	222
Gross Transfers out, assets	(1,794)	(110)	(1,924)	(1,145)
Balance End of Period	32,245	36,037	32,245	36,037
Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	359	104	391	200
Liabilities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	3,874	3,410	4,323	3,413
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(247)	300	(789)	219
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	81	123	174	201
Gross Transfers in, liabilities	0	(3)	0	(3)
Gross Transfers out, liabilities	2	0	2	0
Balance at the End of the Period	3,710	3,830	3,710	3,830
Liabilities | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	311	(209)	942	(95)
Policyholder contract deposits
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	3,696	3,072	4,136	3,033
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(238)	340	(744)	295
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	76	106	142	190
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	3,534	3,518	3,534	3,518
Policyholder contract deposits | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	298	(283)	902	(185)
Other Policyholder Funds
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the End of the Period	0		0
Derivative liabilities, net
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	178	280	187	309
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(9)	(42)	(45)	(90)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	5	16	32	35
Gross Transfers in, liabilities	0	(3)	0	(3)
Gross Transfers out, liabilities	2	0	2	0
Balance at the End of the Period	176	251	176	251
Derivative liabilities, net | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	13	76	40	94
Interest rate contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	17	32	22	38
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(1)	2	(4)	(1)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(2)	(4)	(4)	(7)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	14	30	14	30
Interest rate contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	1	(1)	4	2
Foreign exchange contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	1	6	0	11
Net realized and unrealized gains and losses related to Level 3 items, liabilities	6	1	(4)	1
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(2)	0	9	(5)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	5	7	5	7
Foreign exchange contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(4)	(1)	(3)	(1)
Equity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(78)	(62)	(82)	(58)
Net realized and unrealized gains and losses related to Level 3 items, liabilities	5	(4)	9	(15)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(8)	3	(8)	10
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	2	0	2	0
Balance at the End of the Period	(79)	(63)	(79)	(63)
Equity contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(5)	9	(9)	14
Commodity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	0	0	0	0
Net realized and unrealized gains and losses related to Level 3 items, liabilities	0	0	0	0
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	0	0	0	0
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	0	0	0	0
Commodity contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	0	0	0	0
Credit contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	250	315	262	329
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(4)	(21)	(14)	(36)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	0	(1)	(2)	0
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	246	293	246	293
Credit contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	3	23	13	34
Other contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(12)	(11)	(15)	(11)
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(15)	(20)	(32)	(39)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	17	18	37	37
Gross Transfers in, liabilities	0	(3)	0	(3)
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	(10)	(16)	(10)	(16)
Other contracts | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	18	46	35	45
Long-term debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	0	58	0	71
Net realized and unrealized gains and losses related to Level 3 items, liabilities	0	2	0	14
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	0	1	0	(24)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	0	61	0	61
Long-term debt | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	0	(2)	0	(4)
Bonds available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	28,410	28,381	28,996	29,971
Net Realized and Unrealized Gains (Losses) Included in Income	150	258	370	556
Other Comprehensive Income (Loss)	(51)	573	(212)	770
Purchases, Sales, Issues and Settlements, Net	(995)	(219)	(2,084)	(1,520)
Gross Transfers in, assets	58	78	623	222
Gross Transfers out, assets	(1,794)	(109)	(1,915)	(1,037)
Balance End of Period	25,778	28,962	25,778	28,962
Bonds available for sale | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Bonds available for sale | Obligations of states, municipalities and political subdivisions
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	2,261	2,041	2,404	2,040
Net Realized and Unrealized Gains (Losses) Included in Income	0	(1)	1	1
Other Comprehensive Income (Loss)	(40)	89	(115)	85
Purchases, Sales, Issues and Settlements, Net	(29)	148	(98)	169
Gross Transfers in, assets	0	8	0	8
Gross Transfers out, assets	(136)	0	(136)	(18)
Balance End of Period	2,056	2,285	2,056	2,285
Bonds available for sale | Obligations of states, municipalities and political subdivisions | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Bonds available for sale | Non-U.S. governments
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	9	16	8	17
Net Realized and Unrealized Gains (Losses) Included in Income	(1)	0	(5)	0
Other Comprehensive Income (Loss)	2	1	6	1
Purchases, Sales, Issues and Settlements, Net	(5)	(5)	(4)	(6)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	(5)	0	(5)	0
Balance End of Period	0	12	0	12
Bonds available for sale | Non-U.S. governments | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Bonds available for sale | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	1,871	1,079	1,173	1,133
Net Realized and Unrealized Gains (Losses) Included in Income	(8)	5	(65)	1
Other Comprehensive Income (Loss)	(7)	3	3	0
Purchases, Sales, Issues and Settlements, Net	(394)	(153)	(146)	(166)
Gross Transfers in, assets	3	70	568	206
Gross Transfers out, assets	(581)	(72)	(649)	(242)
Balance End of Period	884	932	884	932
Bonds available for sale | Corporate debt | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Bonds available for sale | Residential mortgage-backed securities (RMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	15,839	16,487	16,136	16,906
Net Realized and Unrealized Gains (Losses) Included in Income	153	264	419	553
Other Comprehensive Income (Loss)	(5)	346	0	497
Purchases, Sales, Issues and Settlements, Net	(616)	(681)	(1,152)	(1,539)
Gross Transfers in, assets	8	0	8	8
Gross Transfers out, assets	(2)	(23)	(34)	(32)
Balance End of Period	15,377	16,393	15,377	16,393
Bonds available for sale | Residential mortgage-backed securities (RMBS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Bonds available for sale | Commercial mortgage-backed securities (CMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	584	1,003	624	2,040
Net Realized and Unrealized Gains (Losses) Included in Income	(2)	18	4	23
Other Comprehensive Income (Loss)	(4)	2	(21)	7
Purchases, Sales, Issues and Settlements, Net	(7)	(274)	(30)	(622)
Gross Transfers in, assets	47	0	47	0
Gross Transfers out, assets	(13)	(14)	(19)	(713)
Balance End of Period	605	735	605	735
Bonds available for sale | Commercial mortgage-backed securities (CMBS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
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
Balance Beginning of Period	7,846	7,755	8,651	7,835
Net Realized and Unrealized Gains (Losses) Included in Income	8	(28)	16	(22)
Other Comprehensive Income (Loss)	3	132	(85)	180
Purchases, Sales, Issues and Settlements, Net	56	746	(654)	644
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	(1,057)	0	(1,072)	(32)
Balance End of Period	6,856	8,605	6,856	8,605
Bonds available for sale | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	0	0
Other bond securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	6,295	7,093	6,512	7,480
Net Realized and Unrealized Gains (Losses) Included in Income	131	243	259	472
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(358)	(498)	(695)	(1,008)
Gross Transfers in, assets	0	0	1	0
Gross Transfers out, assets	0	0	(9)	(106)
Balance End of Period	6,068	6,838	6,068	6,838
Other bond securities | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	359	100	366	196
Other bond securities | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	19	18	18	17
Net Realized and Unrealized Gains (Losses) Included in Income	(1)	0	0	1
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	0	10	0	10
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0		0
Balance End of Period	18	28	18	28
Other bond securities | Corporate debt | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	0	1	1
Other bond securities | Residential mortgage-backed securities (RMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	1,427	1,502	1,464	1,605
Net Realized and Unrealized Gains (Losses) Included in Income	16	66	55	121
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(105)	(58)	(181)	(183)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	0	(33)
Balance End of Period	1,338	1,510	1,338	1,510
Other bond securities | Residential mortgage-backed securities (RMBS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	151	43	153	67
Other bond securities | Commercial mortgage-backed securities (CMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	73	65	74	155
Net Realized and Unrealized Gains (Losses) Included in Income	(2)	2	(3)	2
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	0	(1)	(1)	(18)
Gross Transfers in, assets	0	0	1	0
Gross Transfers out, assets	0	0	0	(73)
Balance End of Period	71	66	71	66
Other bond securities | Commercial mortgage-backed securities (CMBS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	4	2	4	3
Other bond securities | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	4,776	5,508	4,956	5,703
Net Realized and Unrealized Gains (Losses) Included in Income	118	175	207	348
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(253)	(449)	(513)	(817)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	(9)	0
Balance End of Period	4,641	5,234	4,641	5,234
Other bond securities | Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	204	55	208	125
Equity securities available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period		8		0
Net Realized and Unrealized Gains (Losses) Included in Income		0		0
Other Comprehensive Income (Loss)		0		0
Purchases, Sales, Issues and Settlements, Net		0		8
Gross Transfers in, assets		0		0
Gross Transfers out, assets		(1)		(1)
Balance End of Period		7		7
Equity securities available for sale | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets		0		0
Equity securities available for sale | Common Stock
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period		8		0
Net Realized and Unrealized Gains (Losses) Included in Income		0		0
Other Comprehensive Income (Loss)		0		0
Purchases, Sales, Issues and Settlements, Net		0		8
Gross Transfers in, assets		0		0
Gross Transfers out, assets		(1)		(1)
Balance End of Period		7		7
Equity securities available for sale | Common Stock | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets		0		0
Mortgage and other loans receivable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	0	11	5	11
Purchases, Sales, Issues and Settlements, Net	0	(6)	(5)	(6)
Gross Transfers out, assets	0		0
Balance End of Period	0	5	0	5
Other invested assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	292	180	250	204
Net Realized and Unrealized Gains (Losses) Included in Income	29	4	52	3
Other Comprehensive Income (Loss)	0	2	1	(3)
Purchases, Sales, Issues and Settlements, Net	78	39	96	22
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	0	(1)
Balance End of Period	399	225	399	225
Other invested assets | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	0	4	25	4
Other equity securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	3		0
Net Realized and Unrealized Gains (Losses) Included in Income	(3)		(3)	0
Other Comprehensive Income (Loss)	0		0
Purchases, Sales, Issues and Settlements, Net	0		3	0
Gross Transfers in, assets	0		0
Gross Transfers out, assets	0		0
Balance End of Period	0	$ 0	0	$ 0
Other equity securities | Trading Revenue
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	$ 0		$ 0