INVESTMENTS (Details 5) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	$ 1,294	$ 382
Gross unrecognized losses less than 12 months	25	7
Fair value 12 months or longer	873	2,311
Gross unrecognized losses 12 months or longer	374	396
Fair value, total	2,167	2,693
Gross unrecognized losses, total	399	403
Unrealized loss, other than temporary impairment, not credit loss, recorded in AOCI	908	1,532
Mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	29	88
Gross unrecognized losses less than 12 months	2	7
Fair value 12 months or longer	376	1,522
Gross unrecognized losses 12 months or longer	320	351
Fair value, total	405	1,610
Gross unrecognized losses, total	322	358
State and municipal securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	241
Gross unrecognized losses less than 12 months	16
Fair value 12 months or longer	299	383
Gross unrecognized losses 12 months or longer	50	37
Fair value, total	540	383
Gross unrecognized losses, total	66	37
Foreign Government
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	924	294
Gross unrecognized losses less than 12 months	1
Fair value, total	924	294
Gross unrecognized losses, total	1
Asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	100
Gross unrecognized losses less than 12 months	6
Fair value 12 months or longer	198	406
Gross unrecognized losses 12 months or longer	4	8
Fair value, total	298	406
Gross unrecognized losses, total	$ 10	$ 8