Annual report pursuant to Section 13 and 15(d)

INVESTMENTS (Details 6)

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INVESTMENTS (Details 6) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Investments Disclosure [Abstract]  
Available-for-sale securities, within 1 year, cost $ 5
Available-for-sale securities, within 1 year, fair value 5
Available-for-sale securities, after 1 years through 5 years, cost 32
Available-for-sale securities, after 1 years through 5 years, fair value 32
Available-for-sale securities, after 5 years through 10 years, cost 191
Available-for-sale securities, after 5 years through 10 years, fair value 191
Available-for-sale securities, after 10 years, cost 104
Available-for-sale securities, after 10 years, fair value 102
Held-to-maturity securities, within 1 year, amortized cost 113
Held-to-maturity securities, within 1 year, fair value 113
Held-to-maturity securities, after 1 year through 5 years, amortized cost 0
Held-to-maturity securities, after 1 year through 5 years, fair value 0
Held-to-maturity securities, after 5 years through 10 years, amortized cost 0
Held-to-maturity securities, after 5 years through 10 years, fair value 0
Held-to-maturity securities, after 10 years, amortized cost 0
Held-to-maturity securities, after 10 years, fair value $ 0