INVESTMENTS (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	$ 250,688,000,000	$ 247,789,000,000
Available for sale securities, Gross Unrealized Gains	17,070,000,000	26,815,000,000
Available for sale securities, Gross Unrealized Losses	(4,479,000,000)	(1,433,000,000)
Available for sale securities, Fair Value	263,279,000,000	273,171,000,000
AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	1,785,000,000	1,450,000,000
Bonds available for sale
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	249,062,000,000	246,149,000,000
Available for sale securities, Gross Unrealized Gains	15,293,000,000	25,206,000,000
Available for sale securities, Gross Unrealized Losses	(4,454,000,000)	(1,396,000,000)
Available for sale securities, Fair Value	259,901,000,000	269,959,000,000
Other details of available for sale securities
Available for sale securities not rated or rated below investment grade	31,100,000,000	29,600,000,000
Bonds available for sale | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	1,785,000,000	1,450,000,000
Bonds available for sale | U.S. government and government sponsored entities
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	3,278,000,000	3,161,000,000
Available for sale securities, Gross Unrealized Gains	190,000,000	323,000,000
Available for sale securities, Gross Unrealized Losses	(33,000,000)	(1,000,000)
Available for sale securities, Fair Value	3,435,000,000	3,483,000,000
Bonds available for sale | Obligations of states, municipalities and political subdivisions
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	29,967,000,000	33,042,000,000
Available for sale securities, Gross Unrealized Gains	1,319,000,000	2,685,000,000
Available for sale securities, Gross Unrealized Losses	(405,000,000)	(22,000,000)
Available for sale securities, Fair Value	30,881,000,000	35,705,000,000
Bonds available for sale | Obligations of states, municipalities and political subdivisions | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	2,000,000	2,000,000
Bonds available for sale | Non-U.S. government
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	22,580,000,000	25,449,000,000
Available for sale securities, Gross Unrealized Gains	793,000,000	1,395,000,000
Available for sale securities, Gross Unrealized Losses	(339,000,000)	(44,000,000)
Available for sale securities, Fair Value	23,034,000,000	26,800,000,000
Bonds available for sale | Corporate debt
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	138,286,000,000	135,728,000,000
Available for sale securities, Gross Unrealized Gains	8,644,000,000	15,848,000,000
Available for sale securities, Gross Unrealized Losses	(2,762,000,000)	(464,000,000)
Available for sale securities, Fair Value	144,168,000,000	151,112,000,000
Bonds available for sale | Corporate debt | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	78,000,000	115,000,000
Bonds available for sale | Mortgage-backed, asset-backed and collateralized
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	54,951,000,000	48,769,000,000
Available for sale securities, Gross Unrealized Gains	4,347,000,000	4,955,000,000
Available for sale securities, Gross Unrealized Losses	(915,000,000)	(865,000,000)
Available for sale securities, Fair Value	58,383,000,000	52,859,000,000
Bonds available for sale | Mortgage-backed, asset-backed and collateralized | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	1,705,000,000	1,333,000,000
Bonds available for sale | Residential mortgage-backed securities (RMBS)
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	33,833,000,000	31,330,000,000
Available for sale securities, Gross Unrealized Gains	3,094,000,000	3,379,000,000
Available for sale securities, Gross Unrealized Losses	(451,000,000)	(317,000,000)
Available for sale securities, Fair Value	36,476,000,000	34,392,000,000
Bonds available for sale | Residential mortgage-backed securities (RMBS) | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	1,554,000,000	1,330,000,000
Bonds available for sale | Commercial mortgage-backed securities (CMBS)
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	11,203,000,000	9,449,000,000
Available for sale securities, Gross Unrealized Gains	605,000,000	770,000,000
Available for sale securities, Gross Unrealized Losses	(296,000,000)	(304,000,000)
Available for sale securities, Fair Value	11,512,000,000	9,915,000,000
Bonds available for sale | Commercial mortgage-backed securities (CMBS) | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	89,000,000	(79,000,000)
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	9,915,000,000	7,990,000,000
Available for sale securities, Gross Unrealized Gains	648,000,000	806,000,000
Available for sale securities, Gross Unrealized Losses	(168,000,000)	(244,000,000)
Available for sale securities, Fair Value	10,395,000,000	8,552,000,000
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS) | AOCI- OTTI
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Total, Other-Than-Temporary Impairments in AOCI	62,000,000	82,000,000
Equity securities available for sale
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	1,626,000,000	1,640,000,000
Available for sale securities, Gross Unrealized Gains	1,777,000,000	1,609,000,000
Available for sale securities, Gross Unrealized Losses	(25,000,000)	(37,000,000)
Available for sale securities, Fair Value	3,378,000,000	3,212,000,000
Equity securities available for sale | Common Stock
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	1,284,000,000	1,492,000,000
Available for sale securities, Gross Unrealized Gains	1,748,000,000	1,574,000,000
Available for sale securities, Gross Unrealized Losses	(14,000,000)	(37,000,000)
Available for sale securities, Fair Value	3,018,000,000	3,029,000,000
Equity securities available for sale | Preferred Stock
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	53,000,000	55,000,000
Available for sale securities, Gross Unrealized Gains	25,000,000	23,000,000
Available for sale securities, Gross Unrealized Losses	(1,000,000)
Available for sale securities, Fair Value	77,000,000	78,000,000
Equity securities available for sale | Mutual Funds
Reconciliation of amortized cost and fair value of available for sale securities and other invested assets carried at fair value
Available for sale securities, Amortized Cost or Cost	289,000,000	93,000,000
Available for sale securities, Gross Unrealized Gains	4,000,000	12,000,000
Available for sale securities, Gross Unrealized Losses	(10,000,000)
Available for sale securities, Fair Value	$ 283,000,000	$ 105,000,000