Financial Instruments (Details 2) (Foreign Exchange Forward [Member], Level 2 [Member], Fair Value, Measurements, Recurring [Member], USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Foreign Exchange Forward [Member] | Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Financial Assets
Foreign Currency Contract Asset At Fair Value	$ 0	$ 2
Financial Liabilities:
Foreign Currency Contracts Liability At Fair Value	$ 2	$ 0