FAIR VALUE MEASUREMENTS (Details - Changes in Level 3 Recurring Fair Value Measurements) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	$ 36,037	$ 37,576	$ 37,666	$ 38,020
Net Realized and Unrealized Gains (Losses) Included in Income	442	476	1,473	990
Other Comprehensive Income (Loss)	526	309	1,293	91
Purchases, Sales, Issues and Settlements, Net	(1,534)	(20)	(4,038)	(415)
Gross Transfers in, assets	460	307	682	1,003
Gross Transfers out, assets	(217)	(192)	(1,362)	(1,233)
Reclassified to Assets Held for Sale	0	(88)	0	(88)
Balance End of Period	35,714	38,368	35,714	38,368
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	15	16	215	(411)
Liabilities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	3,830	4,535	3,413	3,028
Net realized and unrealized gains and losses related to Level 3 items, liabilities	250	9	469	1,457
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	114	(11)	315	161
Gross Transfers in, liabilities	0	0	(3)	0
Gross Transfers out, liabilities	0	1	0	(112)
Balance at the End of the Period	4,194	4,534	4,194	4,534
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	45	67	137	95
Policyholder contract deposits
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	3,518	3,990	3,033	2,289
Net realized and unrealized gains and losses related to Level 3 items, liabilities	299	65	594	1,508
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	157	(33)	347	225
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	3,974	4,022	3,974	4,022
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	1	1	3	38
Derivative liabilities, net
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	251	478	309	556
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(51)	(59)	(141)	(54)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	17	22	52	(61)
Gross Transfers in, liabilities	0	0	(3)	0
Gross Transfers out, liabilities	0	1	0	1
Balance at the End of the Period	217	442	217	442
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	40	69	134	57
Interest rate contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	30	46	38	50
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(2)	(3)	(3)	4
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(2)	9	(9)	(2)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	26	52	26	52
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	4	3	(5)
Foreign exchange contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	7	9	11	7
Net realized and unrealized gains and losses related to Level 3 items, liabilities	0	1	1	3
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(4)	(1)	(9)	(1)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	3	9	3	9
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	0	(1)	(1)	(2)
Equity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(63)	(52)	(58)	(54)
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(11)	(5)	(26)	(5)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	5	3	15	5
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	(69)	(54)	(69)	(54)
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	8	5	22	5
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
Purchases, Sales, Issues and Settlements-Net		0
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	293	373	329	505
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(19)	(36)	(55)	(70)
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(1)	7	(1)	(91)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	1	0	1
Balance at the End of the Period	273	345	273	345
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	19	28	53	56
Other contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(16)	102	(11)	48
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(19)	(16)	(58)	14
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	19	4	56	28
Gross Transfers in, liabilities	0	0	(3)	0
Gross Transfers out, liabilities	0	0	0	0
Balance at the End of the Period	(16)	90	(16)	90
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	12	33	57	3
Long-term debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	61	67	71	183
Net realized and unrealized gains and losses related to Level 3 items, liabilities	2	3	16	3
Accumulated Other Comprehensive Income (loss)	0	0	0	0
Purchases, Sales, Issues and Settlements-Net	(60)	0	(84)	(3)
Gross Transfers in, liabilities	0	0	0	0
Gross Transfers out, liabilities	0	0	0	(113)
Balance at the End of the Period	3	70	3	70
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	4	0	0	0
Bonds available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	28,962	29,326	29,971	28,817
Net Realized and Unrealized Gains (Losses) Included in Income	265	268	821	830
Other Comprehensive Income (Loss)	528	308	1,298	89
Purchases, Sales, Issues and Settlements, Net	(975)	617	(2,495)	1,056
Gross Transfers in, assets	460	307	682	938
Gross Transfers out, assets	(155)	(192)	(1,192)	(1,096)
Reclassified to Assets Held for Sale	0	(88)	0	(88)
Balance End of Period	29,085	30,546	29,085	30,546
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	2,285	2,313	2,040	2,124
Net Realized and Unrealized Gains (Losses) Included in Income	2	1	3	3
Other Comprehensive Income (Loss)	38	(5)	123	189
Purchases, Sales, Issues and Settlements, Net	52	58	221	51
Gross Transfers in, assets	0	2	8	2
Gross Transfers out, assets	(6)	(78)	(24)	(78)
Reclassified to Assets Held for Sale		0		0
Balance End of Period	2,371	2,291	2,371	2,291
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. government
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	12	28	17	32
Net Realized and Unrealized Gains (Losses) Included in Income	(5)	(3)	(5)	(3)
Other Comprehensive Income (Loss)	4	(9)	5	(11)
Purchases, Sales, Issues and Settlements, Net	0	3	(6)	5
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	0	(4)
Reclassified to Assets Held for Sale		0		0
Balance End of Period	11	19	11	19
Bonds available for sale | Non-U.S. government | 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	932	836	1,133	1,370
Net Realized and Unrealized Gains (Losses) Included in Income	5	(4)	6	(1)
Other Comprehensive Income (Loss)	(2)	7	(2)	(10)
Purchases, Sales, Issues and Settlements, Net	(53)	(6)	(219)	(42)
Gross Transfers in, assets	449	267	655	581
Gross Transfers out, assets	(121)	(82)	(363)	(880)
Reclassified to Assets Held for Sale	0	(1)	0	(1)
Balance End of Period	1,210	1,017	1,210	1,017
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	16,393	16,779	16,906	16,537
Net Realized and Unrealized Gains (Losses) Included in Income	253	255	806	734
Other Comprehensive Income (Loss)	495	304	992	(55)
Purchases, Sales, Issues and Settlements, Net	(731)	(165)	(2,270)	(337)
Gross Transfers in, assets	11	36	19	330
Gross Transfers out, assets	(7)	0	(39)	0
Reclassified to Assets Held for Sale		0		0
Balance End of Period	16,414	17,209	16,414	17,209
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	735	2,295	2,040	2,585
Net Realized and Unrealized Gains (Losses) Included in Income	2	12	25	70
Other Comprehensive Income (Loss)	5	(5)	12	(83)
Purchases, Sales, Issues and Settlements, Net	(77)	(1)	(699)	(169)
Gross Transfers in, assets	0	2	0	2
Gross Transfers out, assets	0	(32)	(713)	(134)
Reclassified to Assets Held for Sale	0	(6)	0	(6)
Balance End of Period	665	2,265	665	2,265
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	8,605	7,075	7,835	6,169
Net Realized and Unrealized Gains (Losses) Included in Income	8	7	(14)	27
Other Comprehensive Income (Loss)	(12)	16	168	59
Purchases, Sales, Issues and Settlements, Net	(166)	728	478	1,548
Gross Transfers in, assets	0	0	0	23
Gross Transfers out, assets	(21)	0	(53)	0
Reclassified to Assets Held for Sale	0	(81)	0	(81)
Balance End of Period	8,414	7,745	8,414	7,745
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	6,838	7,984	7,480	8,846
Net Realized and Unrealized Gains (Losses) Included in Income	177	212	649	165
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(593)	(641)	(1,601)	(1,438)
Gross Transfers in, assets	0	0	0	65
Gross Transfers out, assets	(62)	0	(168)	(83)
Balance End of Period	6,360	7,555	6,360	7,555
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	18	16	214	(409)
Other bond securities | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	28	18	17	17
Net Realized and Unrealized Gains (Losses) Included in Income	1	1	2	3
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	0	0	10	(1)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	(11)		(11)
Balance End of Period	18	19	18	19
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	3
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	1,510	1,486	1,605	1,581
Net Realized and Unrealized Gains (Losses) Included in Income	63	30	184	7
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(130)	(120)	(313)	(174)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	(33)	(18)
Balance End of Period	1,443	1,396	1,443	1,396
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	49	12	116	(48)
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	66	168	155	193
Net Realized and Unrealized Gains (Losses) Included in Income	2	6	4	4
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	42	(15)	24	(38)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	(45)	0	(118)	0
Balance End of Period	65	159	65	159
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	3	4	6	14
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	5,234	6,312	5,703	7,055
Net Realized and Unrealized Gains (Losses) Included in Income	111	175	459	151
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(505)	(506)	(1,322)	(1,225)
Gross Transfers in, assets	0	0	0	65
Gross Transfers out, assets	(6)	0	(6)	(65)
Balance End of Period	4,834	5,981	4,834	5,981
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	(34)	0	91	(378)
Equity securities available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	7	0	0	0
Net Realized and Unrealized Gains (Losses) Included in Income	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(2)	0	6	0
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	(1)	0
Balance End of Period	5	0	5	0
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	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	7	0	0	0
Net Realized and Unrealized Gains (Losses) Included in Income	0	0	0	0
Other Comprehensive Income (Loss)	0	0	0	0
Purchases, Sales, Issues and Settlements, Net	(2)	0	6	0
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	(1)	0
Balance End of Period	5	0	5	0
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	0	0
Mortgage and other loans receivable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	5	11	11	11
Purchases, Sales, Issues and Settlements, Net	0	0	(6)	0
Gross Transfers out, assets	0		0
Balance End of Period	5	11	5	11
Other invested assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	225	241	204	332
Net Realized and Unrealized Gains (Losses) Included in Income	0	(4)	3	(5)
Other Comprehensive Income (Loss)	(2)	1	(5)	2
Purchases, Sales, Issues and Settlements, Net	36	18	58	(19)
Gross Transfers in, assets	0	0	0	0
Gross Transfers out, assets	0	0	(1)	(54)
Balance End of Period	259	256	259	256
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	(3)		1	(2)
Other equity securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	0	14	0	14
Net Realized and Unrealized Gains (Losses) Included in Income	0	0		0
Purchases, Sales, Issues and Settlements, Net	0	(14)	0	(14)
Gross Transfers in, 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