INVESTMENTS (Details 5) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	$ 983,000,000	$ 1,215,000,000
Gross unrecognized losses less than 12 months	40,000,000	134,000,000
Fair value 12 months or longer	2,527,000,000	7,242,000,000
Gross unrecognized losses 12 months or longer	486,000,000	1,031,000,000
Fair value, total	3,510,000,000	8,457,000,000
Gross unrecognized losses, total	526,000,000	1,165,000,000
Unrealized loss, other than temporary impairment, not credit loss, recorded in AOCI	1,700,000,000	2,300,000,000
Mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	203,000,000	735,000,000
Gross unrecognized losses less than 12 months	11,000,000	63,000,000
Fair value 12 months or longer	1,755,000,000	4,827,000,000
Gross unrecognized losses 12 months or longer	419,000,000	689,000,000
Fair value, total	1,958,000,000	5,562,000,000
Gross unrecognized losses, total	430,000,000	752,000,000
State and municipal securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value 12 months or longer	368,000,000	682,000,000
Gross unrecognized losses 12 months or longer	34,000,000	72,000,000
Fair value, total	368,000,000	682,000,000
Gross unrecognized losses, total	34,000,000	72,000,000
Foreign Government
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	552,000,000
Gross unrecognized losses less than 12 months	1,000,000
Fair value, total	552,000,000
Gross unrecognized losses, total	1,000,000
Corporate
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value 12 months or longer		1,427,000,000
Gross unrecognized losses 12 months or longer		254,000,000
Fair value, total		1,427,000,000
Gross unrecognized losses, total		254,000,000
Asset-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months	228,000,000	480,000,000
Gross unrecognized losses less than 12 months	28,000,000	71,000,000
Fair value 12 months or longer	404,000,000	306,000,000
Gross unrecognized losses 12 months or longer	33,000,000	16,000,000
Fair value, total	632,000,000	786,000,000
Gross unrecognized losses, total	$ 61,000,000	$ 87,000,000