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Financial Instruments (Details) (USD $)
In Millions
9 Months Ended3 Months Ended9 Months Ended3 Months Ended9 Months Ended
Sep. 30, 2011
Aug. 31, 2011
Dec. 31, 2010
Sep. 30, 2011
Foreign Currency Forward Contracts [Member]
Marketing general and administrative [Member]
Sep. 30, 2010
Foreign Currency Forward Contracts [Member]
Marketing general and administrative [Member]
Sep. 30, 2011
Foreign Currency Forward Contracts [Member]
Marketing general and administrative [Member]
Sep. 30, 2010
Foreign Currency Forward Contracts [Member]
Marketing general and administrative [Member]
Sep. 30, 2011
Foreign Currency Forward Contracts [Member]
Other Current Assets [Member]
Dec. 31, 2010
Foreign Currency Forward Contracts [Member]
Other Current Assets [Member]
Sep. 30, 2011
Foreign Currency Forward Contracts [Member]
Other Accrued Liabilities [Member]
Dec. 31, 2010
Foreign Currency Forward Contracts [Member]
Other Accrued Liabilities [Member]
Sep. 30, 2011
Interest Rate Swaps [Member]
Interest Expense [Member]
Sep. 30, 2010
Interest Rate Swaps [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Swaps [Member]
Interest Expense [Member]
Sep. 30, 2010
Interest Rate Swaps [Member]
Interest Expense [Member]
Sep. 30, 2011
Interest Rate Swaps [Member]
Other Assets [Member]
Dec. 31, 2010
Interest Rate Swaps [Member]
Other Assets [Member]
Fair value of derivative instruments included in our consolidated condensed balance sheet                 
Derivative Asset Designated as Hedging Instrument, Fair Value       $ 3$ 0$ 8$ 2    $ 0$ 24
Effects of derivative instruments in our consolidated condensed statement of operations                 
Gain/(Loss) Recognized in Income   (3)11(6)1    22812  
Additional Financial Instruments (Textuals) [Abstract]                 
Short-term investments Balances0 250              
Debt, fair value4,635 4,298              
Debt, carrying amount3,9007503,885              
Maximum maturity period for foreign currency forward contracts180 days                
Aggregate amount of foreign currency forward contracts outstanding$ 157 $ 156