INVESTMENTS (Details 5) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months		$ 2,106
Gross unrecognized losses less than 12 months		184
Fair value 12 months or longer	10,463	17,756
Gross unrecognized losses 12 months or longer	740	658
Fair value, total	10,463	19,862
Gross unrecognized losses, total	740	842
Mortgage-backed securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months		339
Gross unrecognized losses less than 12 months		30
Fair value 12 months or longer	7,061	14,410
Gross unrecognized losses 12 months or longer	384	387
Fair value, total	7,061	14,749
Gross unrecognized losses, total	384	417
State and municipal securities
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months		24
Fair value 12 months or longer	805	1,273
Gross unrecognized losses 12 months or longer	199	104
Fair value, total	805	1,297
Gross unrecognized losses, total	199	104
Corporate
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months		1,584
Gross unrecognized losses less than 12 months		143
Fair value 12 months or longer	2,074	1,579
Gross unrecognized losses 12 months or longer	142	124
Fair value, total	2,074	3,163
Gross unrecognized losses, total	142	267
Asset-based financing
Held-to-maturity Securities, Continuous Unrealized Loss Position
Fair value less than 12 months		159
Gross unrecognized losses less than 12 months		11
Fair value 12 months or longer	523	494
Gross unrecognized losses 12 months or longer	15	43
Fair value, total	523	653
Gross unrecognized losses, total	$ 15	$ 54