FAIR VALUE MEASUREMENTS (Details 4) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	$ 38,027	$ 34,656
Net Realized and Unrealized Gains (Losses) Included in Income	4,499	(642)
Accumulated Other Comprehensive Income (Loss)	3,586	923
Purchases, Sales, Issues and Settlements, Net	(4,131)	2,503
Gross Transfers in, assets	4,606	5,214
Gross Transfers out, assets	(7,234)	(4,627)
Balance End of Period	39,353	38,027
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	2,676	(615)
Liabilities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(3,849)	(4,544)
Net Realized and Unrealized Gains (Losses) Included in Income	(120)	(151)
Accumulated Other Comprehensive Income (loss)	(167)	(51)
Purchases, Sales, Issues and Settlements-Net	871	790
Gross Transfers in, liabilities	(133)	(26)
Gross Transfers out, liabilities	424	133
Balance at the End of the Period	(2,974)	(3,849)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(869)	663
Policyholder contract deposits
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(918)	(445)
Net Realized and Unrealized Gains (Losses) Included in Income	(275)	(429)
Accumulated Other Comprehensive Income (loss)	(72)
Purchases, Sales, Issues and Settlements-Net	8	(44)
Balance at the End of the Period	(1,257)	(918)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	112	508
Derivative liabilities, net
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(2,423)	(3,117)
Net Realized and Unrealized Gains (Losses) Included in Income	566	338
Accumulated Other Comprehensive Income (loss)	(18)	(51)
Purchases, Sales, Issues and Settlements-Net	621	279
Gross Transfers in, liabilities	(119)	(5)
Gross Transfers out, liabilities		133
Balance at the End of the Period	(1,373)	(2,423)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(1,086)	290
Interest rate contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	785	732
Net Realized and Unrealized Gains (Losses) Included in Income	(11)	46
Purchases, Sales, Issues and Settlements-Net	(42)	(2)
Gross Transfers in, liabilities		30
Gross Transfers out, liabilities		(21)
Balance at the End of the Period	732	785
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	56	(90)
Foreign exchange contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	2	16
Net Realized and Unrealized Gains (Losses) Included in Income		(11)
Purchases, Sales, Issues and Settlements-Net	(2)	(5)
Gross Transfers in, liabilities		2
Balance at the End of the Period		2
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities		1
Equity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	28	22
Net Realized and Unrealized Gains (Losses) Included in Income	10	(16)
Purchases, Sales, Issues and Settlements-Net	12	41
Gross Transfers in, liabilities	(3)	(7)
Gross Transfers out, liabilities		(12)
Balance at the End of the Period	47	28
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(10)	(15)
Commodity contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	2	23
Net Realized and Unrealized Gains (Losses) Included in Income	5	1
Purchases, Sales, Issues and Settlements-Net	(6)	(22)
Balance at the End of the Period	1	2
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(6)	(1)
Credit contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(3,273)	(3,798)
Net Realized and Unrealized Gains (Losses) Included in Income	638	332
Purchases, Sales, Issues and Settlements-Net	644	193
Balance at the End of the Period	(1,991)	(3,273)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	(1,172)	493
Other contracts
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	33	(112)
Net Realized and Unrealized Gains (Losses) Included in Income	(76)	(14)
Accumulated Other Comprehensive Income (loss)	(18)	(51)
Purchases, Sales, Issues and Settlements-Net	15	74
Gross Transfers in, liabilities	(116)	(30)
Gross Transfers out, liabilities		166
Balance at the End of the Period	(162)	33
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	46	(98)
Long-term debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance at the Beginning of the Period	(508)	(982)
Net Realized and Unrealized Gains (Losses) Included in Income	(411)	(60)
Accumulated Other Comprehensive Income (loss)	(77)
Purchases, Sales, Issues and Settlements-Net	242	555
Gross Transfers in, liabilities	(14)	(21)
Gross Transfers out, liabilities	424
Balance at the End of the Period	(344)	(508)
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, liabilities	105	(135)
Other long-term debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Net Realized and Unrealized Gains (Losses) Included in Income	(411)	(60)
Purchases, Sales, Issues and Settlements-Net	242	555
Bonds available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	21,956	17,088
Net Realized and Unrealized Gains (Losses) Included in Income	726	(64)
Accumulated Other Comprehensive Income (Loss)	3,352	756
Purchases, Sales, Issues and Settlements, Net	439	3,479
Gross Transfers in, assets	2,425	4,576
Gross Transfers out, assets	(4,746)	(3,879)
Balance End of Period	24,152	21,956
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	960	609
Net Realized and Unrealized Gains (Losses) Included in Income	48	2
Accumulated Other Comprehensive Income (Loss)	12	112
Purchases, Sales, Issues and Settlements, Net	84	296
Gross Transfers in, assets	70	17
Gross Transfers out, assets	(150)	(76)
Balance End of Period	1,024	960
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	9	5
Net Realized and Unrealized Gains (Losses) Included in Income	1
Accumulated Other Comprehensive Income (Loss)	(1)
Purchases, Sales, Issues and Settlements, Net	1	5
Gross Transfers in, assets	4
Gross Transfers out, assets		(1)
Balance End of Period	14	9
Bonds available for sale | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	1,935	2,262
Net Realized and Unrealized Gains (Losses) Included in Income	(44)	11
Accumulated Other Comprehensive Income (Loss)	145	(25)
Purchases, Sales, Issues and Settlements, Net	24	171
Gross Transfers in, assets	664	2,480
Gross Transfers out, assets	(1,237)	(2,964)
Balance End of Period	1,487	1,935
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	10,877	6,367
Net Realized and Unrealized Gains (Losses) Included in Income	522	(50)
Accumulated Other Comprehensive Income (Loss)	2,121	288
Purchases, Sales, Issues and Settlements, Net	(316)	3,232
Gross Transfers in, assets	952	1,093
Gross Transfers out, assets	(2,494)	(53)
Balance End of Period	11,662	10,877
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	3,955	3,604
Net Realized and Unrealized Gains (Losses) Included in Income	(135)	(100)
Accumulated Other Comprehensive Income (Loss)	786	239
Purchases, Sales, Issues and Settlements, Net	636	207
Gross Transfers in, assets	44	134
Gross Transfers out, assets	(162)	(129)
Balance End of Period	5,124	3,955
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	4,220	4,241
Net Realized and Unrealized Gains (Losses) Included in Income	334	73
Accumulated Other Comprehensive Income (Loss)	289	142
Purchases, Sales, Issues and Settlements, Net	10	(432)
Gross Transfers in, assets	691	852
Gross Transfers out, assets	(703)	(656)
Balance End of Period	4,841	4,220
Bond trading securities
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	9,296	10,028
Net Realized and Unrealized Gains (Losses) Included in Income	3,829	(595)
Accumulated Other Comprehensive Income (Loss)	7
Purchases, Sales, Issues and Settlements, Net	(4,243)	(190)
Gross Transfers in, assets	960	358
Gross Transfers out, assets	(105)	(305)
Balance End of Period	9,744	9,296
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	2,676	(617)
Bond trading securities | Corporate debt
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	7
Purchases, Sales, Issues and Settlements, Net	(7)	(11)
Gross Transfers in, assets		18
Balance End of Period		7
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets		1
Bond trading securities | Residential mortgage backed securities (RMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	303	91
Net Realized and Unrealized Gains (Losses) Included in Income	76	(27)
Accumulated Other Comprehensive Income (Loss)	2
Purchases, Sales, Issues and Settlements, Net	(109)	239
Gross Transfers in, assets	128
Gross Transfers out, assets	(4)
Balance End of Period	396	303
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	42	(28)
Bond trading securities | Commercial mortgage-backed securities (CMBS)
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	554	506
Net Realized and Unrealized Gains (Losses) Included in Income	70	92
Accumulated Other Comprehensive Income (Loss)	2
Purchases, Sales, Issues and Settlements, Net	(159)	(95)
Gross Transfers in, assets	446	292
Gross Transfers out, assets	(101)	(241)
Balance End of Period	812	554
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	87	87
Bond trading 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	8,432	9,431
Net Realized and Unrealized Gains (Losses) Included in Income	3,683	(660)
Accumulated Other Comprehensive Income (Loss)	3
Purchases, Sales, Issues and Settlements, Net	(3,968)	(323)
Gross Transfers in, assets	386	48
Gross Transfers out, assets		(64)
Balance End of Period	8,536	8,432
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets	2,547	(677)
Equity securities available for sale
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	156	125
Net Realized and Unrealized Gains (Losses) Included in Income	39	27
Accumulated Other Comprehensive Income (Loss)	(63)	28
Purchases, Sales, Issues and Settlements, Net	(69)	(47)
Gross Transfers in, assets	17	29
Gross Transfers out, assets	(12)	(6)
Balance End of Period	68	156
Equity securities available for sale | Common Stock
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	57	61
Net Realized and Unrealized Gains (Losses) Included in Income	22	28
Accumulated Other Comprehensive Income (Loss)	(28)	(4)
Purchases, Sales, Issues and Settlements, Net	(33)	(40)
Gross Transfers in, assets	6	18
Gross Transfers out, assets		(6)
Balance End of Period	24	57
Equity securities available for sale | Preferred Stock
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	99	64
Net Realized and Unrealized Gains (Losses) Included in Income	17	(1)
Accumulated Other Comprehensive Income (Loss)	(35)	32
Purchases, Sales, Issues and Settlements, Net	(36)	(1)
Gross Transfers in, assets	11	5
Gross Transfers out, assets	(12)
Balance End of Period	44	99
Equity securities available for sale | Mutual Funds
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Purchases, Sales, Issues and Settlements, Net		(6)
Gross Transfers in, assets		6
Equity securities trading
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period		1
Purchases, Sales, Issues and Settlements, Net		(1)
Mortgage and other loans receivable
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	1
Purchases, Sales, Issues and Settlements, Net	(1)	1
Balance End of Period		1
Other invested assets
Fair value assets and liabilities measured on recurring basis, unobservable input reconciliation calculation
Balance Beginning of Period	6,618	7,414
Net Realized and Unrealized Gains (Losses) Included in Income	(95)	(10)
Accumulated Other Comprehensive Income (Loss)	290	139
Purchases, Sales, Issues and Settlements, Net	(257)	(739)
Gross Transfers in, assets	1,204	251
Gross Transfers out, assets	(2,371)	(437)
Balance End of Period	5,389	6,618
Changes in Unrealized Gains (Losses) on Instruments Held at End of Period, assets		$ 2