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INVESTMENTS (Details 5) (USD $)
In Millions
Sep. 30, 2011
Dec. 31, 2010
Held-to-maturity Securities, Continuous Unrealized Loss Position  
Fair value less than 12 months$ 106$ 2,106
Gross unrecognized losses less than 12 months5184
Fair value 12 months or longer9,50717,756
Gross unrecognized losses 12 months or longer1,046658
Fair value, total9,61319,862
Gross unrecognized losses, total1,051842
Mortgage-backed securities
  
Held-to-maturity Securities, Continuous Unrealized Loss Position  
Fair value less than 12 months80339
Gross unrecognized losses less than 12 months530
Fair value 12 months or longer6,49814,410
Gross unrecognized losses 12 months or longer536387
Fair value, total6,57814,749
Gross unrecognized losses, total541417
State and municipal securities
  
Held-to-maturity Securities, Continuous Unrealized Loss Position  
Fair value less than 12 months 24
Fair value 12 months or longer7581,273
Gross unrecognized losses 12 months or longer100104
Fair value, total7581,297
Gross unrecognized losses, total100104
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 longer1,6331,579
Gross unrecognized losses 12 months or longer385124
Fair value, total1,6333,163
Gross unrecognized losses, total385267
Asset-based financing
  
Held-to-maturity Securities, Continuous Unrealized Loss Position  
Fair value less than 12 months26159
Gross unrecognized losses less than 12 months 11
Fair value 12 months or longer618494
Gross unrecognized losses 12 months or longer2543
Fair value, total644653
Gross unrecognized losses, total$ 25$ 54