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Derivatives (Details) (USD $)
In Millions
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Derivatives (Textuals) [Abstract]          
Gains (losses) related to these foreign currency forward contracts recorded in the Company consolidated statements of income $ (1) $ (1) $ 1 $ (2)  
Gain (loss) related to hedging contracts (1) (2) (1) (1)  
Liabilities related to foreign currency exchange contracts 2   2   3
Intercompany Loans [Member]
         
Derivatives (Textuals) [Abstract]          
Loss on the foreign currency exchange contract     (4)    
Gains (losses) related to these foreign currency forward contracts recorded in the Company consolidated statements of income 4 1 (1) 5  
Fair Value Hedging [Member]
         
Derivatives (Textuals) [Abstract]          
Assets recorded by the company as a result of hedging activities $ 6   $ 6   $ 7