INVESTMENTS (Details 5) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	$ 1,389,000,000	$ 382,000,000
Gross unrecognized losses less than 12 months	46,000,000	7,000,000
Fair value 12 months or longer	1,049,000,000	2,311,000,000
Gross unrecognized losses 12 months or longer	341,000,000	396,000,000
Fair value, total	2,438,000,000	2,693,000,000
Gross unrecognized losses, total	387,000,000	403,000,000
Unrealized loss, other than temporary impairment, not credit loss, recorded in AOCI	1,000,000,000	1,500,000,000
Mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	40,000,000	88,000,000
Gross unrecognized losses less than 12 months	2,000,000	7,000,000
Fair value 12 months or longer	586,000,000	1,522,000,000
Gross unrecognized losses 12 months or longer	296,000,000	351,000,000
Fair value, total	626,000,000	1,610,000,000
Gross unrecognized losses, total	298,000,000	358,000,000
State and municipal securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	305,000,000
Gross unrecognized losses less than 12 months	23,000,000
Fair value 12 months or longer	256,000,000	383,000,000
Gross unrecognized losses 12 months or longer	39,000,000	37,000,000
Fair value, total	561,000,000	383,000,000
Gross unrecognized losses, total	62,000,000	37,000,000
Foreign Government
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	919,000,000	294,000,000
Gross unrecognized losses less than 12 months	17,000,000
Fair value, total	919,000,000	294,000,000
Gross unrecognized losses, total	17,000,000
Asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	125,000,000
Gross unrecognized losses less than 12 months	4,000,000
Fair value 12 months or longer	207,000,000	406,000,000
Gross unrecognized losses 12 months or longer	6,000,000	8,000,000
Fair value, total	332,000,000	406,000,000
Gross unrecognized losses, total	$ 10,000,000	$ 8,000,000