FAIR VALUE MEASUREMENTS (Details - Changes in Level 3 Recurring Fair Value Measurements) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	$ 35,763	$ 37,666
Net Realized and Unrealized Gains (Losses) Included in Income	371	526
Other Comprehensive Income (Loss)	(160)	192
Purchases, Sales, Issues and Settlements, Net	(1,410)	(1,820)
Gross Transfers in, assets	566	144
Gross Transfers out, assets	(130)	(1,035)
Balance End of Period	35,000	35,673
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	90	96
Liabilities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	4,323	3,413
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(542)	(81)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	93	78
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	3,874	3,410
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	633	114
Policyholder contract deposits
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	4,136	3,033
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(506)	(45)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	66	84
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	3,696	3,072
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	604	98
Derivative liabilities, net
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	187	309
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(36)	(48)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	27	19
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	178	280
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	29	18
Interest rate contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	22	38
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(3)	(3)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	(2)	(3)
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	17	32
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	3	3
Foreign exchange contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	0	11
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(10)	0
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	11	(5)
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	1	6
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	3	0
Equity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(82)	(58)
Net realized and unrealized gains and losses related to Level 3 items, liabilities	4	(11)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	0	7
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	(78)	(62)
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	(4)	5
Commodity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	0
Net realized and unrealized gains and losses related to Level 3 items, liabilities	0
Accumulated Other Comprehensive Income (loss)	0
Purchases, Sales, Issues and Settlements-Net	0
Gross Transfers in, liabilities	0
Gross Transfers out, liabilities	0
Balance at the End of the Period	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
Credit contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	262	329
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(10)	(15)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	(2)	1
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	250	315
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	10	11
Other contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(15)	(11)
Net realized and unrealized gains and losses related to Level 3 items, liabilities	(17)	(19)
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	20	19
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	(12)	(11)
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	17	(1)
Long-term debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	0	71
Net realized and unrealized gains and losses related to Level 3 items, liabilities	0	12
Accumulated Other Comprehensive Income (loss)	0	0
Purchases, Sales, Issues and Settlements-Net	0	(25)
Gross Transfers in, liabilities	0	0
Gross Transfers out, liabilities	0	0
Balance at the End of the Period	0	58
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)
Bonds available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	28,996	29,971
Net Realized and Unrealized Gains (Losses) Included in Income	220	298
Other Comprehensive Income (Loss)	(161)	197
Purchases, Sales, Issues and Settlements, Net	(1,089)	(1,301)
Gross Transfers in, assets	565	144
Gross Transfers out, assets	(121)	(928)
Balance End of Period	28,410	28,381
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	2,404	2,040
Net Realized and Unrealized Gains (Losses) Included in Income	1	2
Other Comprehensive Income (Loss)	(75)	(4)
Purchases, Sales, Issues and Settlements, Net	(69)	21
Gross Transfers in, assets	0	0
Gross Transfers out, assets	0	(18)
Balance End of Period	2,261	2,041
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	8	17
Net Realized and Unrealized Gains (Losses) Included in Income	(4)	0
Other Comprehensive Income (Loss)	4	0
Purchases, Sales, Issues and Settlements, Net	1	(1)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	0	0
Balance End of Period	9	16
Bonds available for sale | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	1,173	1,133
Net Realized and Unrealized Gains (Losses) Included in Income	(57)	(4)
Other Comprehensive Income (Loss)	10	(3)
Purchases, Sales, Issues and Settlements, Net	248	(13)
Gross Transfers in, assets	565	136
Gross Transfers out, assets	(68)	(170)
Balance End of Period	1,871	1,079
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	16,136	16,906
Net Realized and Unrealized Gains (Losses) Included in Income	266	289
Other Comprehensive Income (Loss)	5	151
Purchases, Sales, Issues and Settlements, Net	(536)	(858)
Gross Transfers in, assets	0	8
Gross Transfers out, assets	(32)	(9)
Balance End of Period	15,839	16,487
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	624	2,040
Net Realized and Unrealized Gains (Losses) Included in Income	6	5
Other Comprehensive Income (Loss)	(17)	5
Purchases, Sales, Issues and Settlements, Net	(23)	(348)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	(6)	(699)
Balance End of Period	584	1,003
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	8,651	7,835
Net Realized and Unrealized Gains (Losses) Included in Income	8	6
Other Comprehensive Income (Loss)	(88)	48
Purchases, Sales, Issues and Settlements, Net	(710)	(102)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	(15)	(32)
Balance End of Period	7,846	7,755
Other bond securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	6,512	7,480
Net Realized and Unrealized Gains (Losses) Included in Income	128	229
Other Comprehensive Income (Loss)	0	0
Purchases, Sales, Issues and Settlements, Net	(337)	(510)
Gross Transfers in, assets	1	0
Gross Transfers out, assets	(9)	(106)
Balance End of Period	6,295	7,093
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	58	96
Other bond securities | Obligations of states, municipalities and political subdivisions
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Purchases, Sales, Issues and Settlements, Net	0	0
Other bond securities | Non-U.S. governments
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Purchases, Sales, Issues and Settlements, Net	0	0
Other bond securities | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	18	17
Net Realized and Unrealized Gains (Losses) Included in Income	1	1
Purchases, Sales, Issues and Settlements, Net	0	0
Gross Transfers in, assets	0	0
Balance End of Period	19	18
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	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	1,464	1,605
Net Realized and Unrealized Gains (Losses) Included in Income	39	55
Other Comprehensive Income (Loss)	0	0
Purchases, Sales, Issues and Settlements, Net	(76)	(125)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	0	(33)
Balance End of Period	1,427	1,502
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	51	24
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	74	155
Net Realized and Unrealized Gains (Losses) Included in Income	(1)	0
Other Comprehensive Income (Loss)	0	0
Purchases, Sales, Issues and Settlements, Net	(1)	(17)
Gross Transfers in, assets	1	0
Gross Transfers out, assets	0	(73)
Balance End of Period	73	65
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	(1)	1
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	4,956	5,703
Net Realized and Unrealized Gains (Losses) Included in Income	89	173
Other Comprehensive Income (Loss)	0	0
Purchases, Sales, Issues and Settlements, Net	(260)	(368)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	(9)	0
Balance End of Period	4,776	5,508
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	8	70
Equity securities available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	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	0	0
Balance End of Period	0	8
Equity securities available for sale | Common Stock
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	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	0	0
Balance End of Period	0	8
Mortgage and other loans receivable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	5	11
Purchases, Sales, Issues and Settlements, Net	(5)	0
Gross Transfers in, assets		0
Balance End of Period	0	11
Other invested assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	250	204
Net Realized and Unrealized Gains (Losses) Included in Income	23	(1)
Other Comprehensive Income (Loss)	1	(5)
Purchases, Sales, Issues and Settlements, Net	18	(17)
Gross Transfers in, assets	0	0
Gross Transfers out, assets	0	(1)
Balance End of Period	292	180
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	30
Other equity securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	0
Net Realized and Unrealized Gains (Losses) Included in Income	0	0
Purchases, Sales, Issues and Settlements, Net	3	0
Gross Transfers in, assets	0	0
Balance End of Period	3	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	$ 2	$ 0