FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended			9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Trading Revenue	Sep. 30, 2012 Trading Revenue	Sep. 30, 2013 Trading Revenue	Sep. 30, 2012 Trading Revenue	Sep. 30, 2013 Liabilities	Sep. 30, 2012 Liabilities	Sep. 30, 2013 Liabilities	Sep. 30, 2012 Liabilities	Sep. 30, 2013 Liabilities Trading Revenue	Sep. 30, 2012 Liabilities Trading Revenue	Sep. 30, 2013 Liabilities Trading Revenue	Sep. 30, 2012 Liabilities Trading Revenue	Sep. 30, 2013 Policyholder contract deposits	Sep. 30, 2012 Policyholder contract deposits	Sep. 30, 2013 Policyholder contract deposits	Sep. 30, 2012 Policyholder contract deposits	Sep. 30, 2013 Policyholder contract deposits Trading Revenue	Sep. 30, 2012 Policyholder contract deposits Trading Revenue	Sep. 30, 2013 Policyholder contract deposits Trading Revenue	Sep. 30, 2012 Policyholder contract deposits Trading Revenue	Sep. 30, 2013 Derivative liabilities, net	Sep. 30, 2012 Derivative liabilities, net	Sep. 30, 2013 Derivative liabilities, net	Sep. 30, 2012 Derivative liabilities, net	Sep. 30, 2013 Derivative liabilities, net Trading Revenue	Sep. 30, 2012 Derivative liabilities, net Trading Revenue	Sep. 30, 2013 Derivative liabilities, net Trading Revenue	Sep. 30, 2012 Derivative liabilities, net Trading Revenue	Sep. 30, 2013 Interest rate contracts	Sep. 30, 2012 Interest rate contracts	Sep. 30, 2013 Interest rate contracts	Sep. 30, 2012 Interest rate contracts	Sep. 30, 2013 Interest rate contracts Trading Revenue	Sep. 30, 2012 Interest rate contracts Trading Revenue	Sep. 30, 2013 Interest rate contracts Trading Revenue	Sep. 30, 2012 Interest rate contracts Trading Revenue	Sep. 30, 2012 Foreign exchange contracts	Sep. 30, 2013 Equity contracts	Sep. 30, 2012 Equity contracts	Sep. 30, 2013 Equity contracts	Sep. 30, 2012 Equity contracts	Sep. 30, 2013 Equity contracts Trading Revenue	Sep. 30, 2013 Equity contracts Trading Revenue	Sep. 30, 2012 Commodity contracts	Sep. 30, 2013 Commodity contracts	Sep. 30, 2012 Commodity contracts	Jun. 30, 2013 Commodity contracts	Sep. 30, 2013 Commodity contracts Trading Revenue	Sep. 30, 2013 Credit contracts	Sep. 30, 2012 Credit contracts	Sep. 30, 2013 Credit contracts	Sep. 30, 2012 Credit contracts	Sep. 30, 2013 Credit contracts Trading Revenue	Sep. 30, 2012 Credit contracts Trading Revenue	Sep. 30, 2013 Credit contracts Trading Revenue	Sep. 30, 2012 Credit contracts Trading Revenue	Sep. 30, 2013 Other contracts	Sep. 30, 2012 Other contracts	Sep. 30, 2013 Other contracts	Sep. 30, 2012 Other contracts	Sep. 30, 2013 Other contracts Trading Revenue	Sep. 30, 2012 Other contracts Trading Revenue	Sep. 30, 2013 Other contracts Trading Revenue	Sep. 30, 2012 Other contracts Trading Revenue	Sep. 30, 2013 Long-term debt	Sep. 30, 2012 Long-term debt	Sep. 30, 2013 Long-term debt	Sep. 30, 2012 Long-term debt	Sep. 30, 2013 Long-term debt Trading Revenue	Sep. 30, 2012 Long-term debt Trading Revenue	Sep. 30, 2013 Long-term debt Trading Revenue	Sep. 30, 2012 Long-term debt Trading Revenue	Sep. 30, 2013 Bonds available for sale	Sep. 30, 2012 Bonds available for sale	Sep. 30, 2013 Bonds available for sale	Sep. 30, 2012 Bonds available for sale	Sep. 30, 2013 Bonds available for sale Obligations of states, municipalities and political subdivisions	Sep. 30, 2012 Bonds available for sale Obligations of states, municipalities and political subdivisions	Sep. 30, 2013 Bonds available for sale Obligations of states, municipalities and political subdivisions	Sep. 30, 2012 Bonds available for sale Obligations of states, municipalities and political subdivisions	Sep. 30, 2013 Bonds available for sale Non-U.S. government	Sep. 30, 2012 Bonds available for sale Non-U.S. government	Sep. 30, 2013 Bonds available for sale Non-U.S. government	Sep. 30, 2012 Bonds available for sale Non-U.S. government	Sep. 30, 2013 Bonds available for sale Corporate debt	Sep. 30, 2012 Bonds available for sale Corporate debt	Sep. 30, 2013 Bonds available for sale Corporate debt	Sep. 30, 2012 Bonds available for sale Corporate debt	Sep. 30, 2013 Bonds available for sale Residential mortgage backed securities (RMBS)	Sep. 30, 2012 Bonds available for sale Residential mortgage backed securities (RMBS)	Sep. 30, 2013 Bonds available for sale Residential mortgage backed securities (RMBS)	Sep. 30, 2012 Bonds available for sale Residential mortgage backed securities (RMBS)	Sep. 30, 2013 Bonds available for sale Commercial mortgage-backed securities (CMBS)	Sep. 30, 2012 Bonds available for sale Commercial mortgage-backed securities (CMBS)	Sep. 30, 2013 Bonds available for sale Commercial mortgage-backed securities (CMBS)	Sep. 30, 2012 Bonds available for sale Commercial mortgage-backed securities (CMBS)	Sep. 30, 2013 Bonds available for sale Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2012 Bonds available for sale Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2013 Bonds available for sale Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2012 Bonds available for sale Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2013 Bond trading securities	Sep. 30, 2012 Bond trading securities	Sep. 30, 2013 Bond trading securities	Sep. 30, 2012 Bond trading securities	Sep. 30, 2013 Bond trading securities Trading Revenue	Sep. 30, 2012 Bond trading securities Trading Revenue	Sep. 30, 2013 Bond trading securities Trading Revenue	Sep. 30, 2012 Bond trading securities Trading Revenue	Sep. 30, 2012 Bond trading securities Corporate debt	Sep. 30, 2012 Bond trading securities Corporate debt	Sep. 30, 2013 Bond trading securities Residential mortgage backed securities (RMBS)	Sep. 30, 2012 Bond trading securities Residential mortgage backed securities (RMBS)	Sep. 30, 2013 Bond trading securities Residential mortgage backed securities (RMBS)	Sep. 30, 2012 Bond trading securities Residential mortgage backed securities (RMBS)	Sep. 30, 2013 Bond trading securities Residential mortgage backed securities (RMBS) Trading Revenue	Sep. 30, 2012 Bond trading securities Residential mortgage backed securities (RMBS) Trading Revenue	Sep. 30, 2013 Bond trading securities Residential mortgage backed securities (RMBS) Trading Revenue	Sep. 30, 2012 Bond trading securities Residential mortgage backed securities (RMBS) Trading Revenue	Sep. 30, 2013 Bond trading securities Commercial mortgage-backed securities (CMBS)	Sep. 30, 2012 Bond trading securities Commercial mortgage-backed securities (CMBS)	Sep. 30, 2013 Bond trading securities Commercial mortgage-backed securities (CMBS)	Sep. 30, 2012 Bond trading securities Commercial mortgage-backed securities (CMBS)	Sep. 30, 2013 Bond trading securities Commercial mortgage-backed securities (CMBS) Trading Revenue	Sep. 30, 2012 Bond trading securities Commercial mortgage-backed securities (CMBS) Trading Revenue	Sep. 30, 2013 Bond trading securities Commercial mortgage-backed securities (CMBS) Trading Revenue	Sep. 30, 2012 Bond trading securities Commercial mortgage-backed securities (CMBS) Trading Revenue	Sep. 30, 2013 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2012 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2013 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2012 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS)	Sep. 30, 2013 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) Trading Revenue	Sep. 30, 2012 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) Trading Revenue	Sep. 30, 2013 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) Trading Revenue	Sep. 30, 2012 Bond trading securities Collateralized Debt Obligations/Asset Backed Securities (CDO/ABS) Trading Revenue	Sep. 30, 2013 Equity securities available for sale	Sep. 30, 2012 Equity securities available for sale	Sep. 30, 2013 Equity securities available for sale	Sep. 30, 2012 Equity securities available for sale	Sep. 30, 2013 Equity securities available for sale Common Stock	Sep. 30, 2012 Equity securities available for sale Common Stock	Sep. 30, 2013 Equity securities available for sale Common Stock	Sep. 30, 2012 Equity securities available for sale Common Stock	Sep. 30, 2012 Equity securities available for sale Preferred Stock	Sep. 30, 2013 Equity securities available for sale Preferred Stock	Sep. 30, 2012 Equity securities available for sale Preferred Stock	Jun. 30, 2013 Equity securities available for sale Preferred Stock	Sep. 30, 2013 Other invested assets	Sep. 30, 2012 Other invested assets	Sep. 30, 2013 Other invested assets	Sep. 30, 2012 Other invested assets	Sep. 30, 2012 Mortgage and other loans receivable	Jun. 30, 2012 Mortgage and other loans receivable	Dec. 31, 2011 Mortgage and other loans receivable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	$ 44,227	$ 45,164	$ 39,353	$ 38,027																																																																									$ 27,890	$ 22,537	$ 24,152	$ 21,956	$ 945	$ 1,013	$ 1,024	$ 960	$ 20	$ 13	$ 14	$ 9	$ 1,634	$ 1,306	$ 1,487	$ 1,935	$ 13,694	$ 10,488	$ 11,662	$ 10,877	$ 5,455	$ 4,643	$ 5,124	$ 3,955	$ 6,142	$ 5,074	$ 4,841	$ 4,220	$ 10,574	$ 15,397	$ 9,744	$ 9,296					$ 3	$ 7	$ 782	$ 290	$ 396	$ 303					$ 820	$ 457	$ 812	$ 554					$ 8,972	$ 14,647	$ 8,536	$ 8,432					$ 124	$ 180	$ 68	$ 156	$ 76	$ 41	$ 24	$ 57	$ 139	$ 44	$ 99	$ 48	$ 5,639	$ 7,049	$ 5,389	$ 6,618	$ 1	$ 1	$ 1
Net Realized and Unrealized Gains (Losses) Included in Income	523	949	2,103	4,050																																																																									258	294	795	407	4	16	29	48		1		1	(3)	10	(7)	(7)	216	197	624	322	4	(17)	15	(84)	37	87	134	127	290	618	1,164	3,760							14	40	24	68					33	(3)	44	46					243	581	1,096	3,646						15		40				23	15		17		(25)	22	144	(157)
Other Comprehensive Income (Loss)	2	1,411	216	3,103																																																																									(75)	1,416	120	2,867	(28)		(178)	11		(1)			5	35	(9)	104	(60)	1,029	279	1,832	55	271	75	572	(47)	82	(47)	348																																			(1)	(13)	8	(48)	(1)	(1)	4	(13)	(12)	4	(35)		78	8	88	284
Purchases, Sales, Issues and Settlements, Net	142	(7,524)	1,933	(3,240)																																																																									753	(494)	3,468	735	160	102	365	139	1	2	7			94	30	96	127	(678)	1,393	32	102	115	290	618	363	(129)	1,383	(150)	(618)	(6,836)	(1,629)	(3,850)					(1)	(5)	(8)	(56)	130	(94)					(53)	1	(193)	(121)					(557)	(6,780)	(1,566)	(3,630)					(48)	(104)	(1)	(68)	(48)		(1)	(33)	(104)		(35)		55	(90)	95	(57)
Gross Transfers in, assets	777	1,333	3,122	3,538																																																																									495	888	1,387	2,288		25		70			1	5	39	233	371	579	167	566	186	921		1	161	44	289	63	668	669	281	311	1,390	347							27	97	265	97					31	157	282	193					223	57	843	57						8		17				6	8		11		1	126	345	886
Gross Transfers out, assets	(451)	(808)	(1,507)	(4,953)																																																																									(451)	(761)	(1,052)	(4,373)	(27)	(52)	(186)	(124)		(1)	(1)	(1)	(233)	(66)	(430)	(1,095)	(58)	(114)	(58)	(2,496)			(49)	(92)	(133)	(528)	(328)	(565)		(1)	(142)	(64)								(1)		(4)							(114)	(60)							(28)							(1)		(12)					(1)		(12)			(45)	(313)	(504)
Balance End of Period	45,220	40,525	45,220	40,525																																																																									28,870	23,880	28,870	23,880	1,054	1,104	1,054	1,104	21	14	21	14	1,442	1,612	1,442	1,612	14,086	11,488	14,086	11,488	5,616	5,013	5,616	5,013	6,651	4,649	6,651	4,649	10,527	9,489	10,527	9,489					2	2	815	370	815	370					831	612	831	612					8,881	8,505	8,881	8,505					75	85	75	85	27	40	27	40	45	48	45	48	5,748	7,070	5,748	7,070	1	1	1
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets					259	420	394	2,698																																																																																																					259	420	394	2,698							13	12	(27)	18					29	(19)	(13)	45					217	427	434	2,635
Balance at the Beginning of the Period									(1,854)	(3,545)	(2,974)	(3,849)					(586)	(1,188)	(1,257)	(918)					(849)	(1,950)	(1,373)	(2,423)					779	761	732	785					2	70	28	47	28			2	1	2	1		(1,594)	(2,587)	(1,991)	(3,273)					(105)	(154)	(162)	33					(419)	(407)	(344)	(508)
Net Realized and Unrealized Gains (Losses) Included in Income									311	(19)	1,214	(418)					250	(45)	865	(314)					86	53	469	301					6	(55)	20	(9)						12	18	49	7			4		4			52	208	365	409					16	(122)	35	(110)					(25)	(27)	(120)	(405)
Accumulated Other Comprehensive Income (loss)									(25)	(78)	(16)	(153)						(72)		(72)					(25)	(6)	(16)	(4)																																	(25)	(6)	(16)	(4)								(77)
Purchases, Sales, Issues and Settlements-Net									(943)	260	(733)	741					(51)	(3)	5	(4)					(893)	202	(761)	548					(912)	47	(879)	(23)					(2)	(1)	(4)	(14)	9			(3)	(1)	(5)			36	89	120	574					(16)	73	13	(5)					1	61	23	197
Gross Transfers in, liabilities										(17)	(3)	(142)														17	(1)	(108)														1	1		(1)																(1)	16	(1)	(107)						(34)	(2)	(34)
Gross Transfers out, liabilities										(2)	1	420														(2)	1																					(2)	1																							420
Balance at the End of the Period									(2,511)	(3,401)	(2,511)	(3,401)					(387)	(1,308)	(387)	(1,308)					(1,681)	(1,686)	(1,681)	(1,686)					(127)	753	(127)	753						82	43	82	43			1	1	1	1		(1,506)	(2,290)	(1,506)	(2,290)					(131)	(193)	(131)	(193)					(443)	(407)	(443)	(407)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities													$ 311	$ 89	$ 1,350	$ 311					$ 218	$ (100)	$ 825	$ (325)					$ 112	$ 214	$ 566	$ 859					$ 3	$ (7)	$ 33	$ 12						$ 10	$ 40					$ (1)					$ 91	$ 238	$ 486	$ 876					$ 8	$ (17)	$ 8	$ (29)					$ 19	$ (25)	$ (41)	$ (223)