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Financial Instruments - Foreign Exchange Forward Contracts (Details) - Jun. 30, 2015 - USD ($)
$ in Millions
Total
Derivatives, Fair Value [Line Items]  
Financial Instruments Collected Before Maturity Date And Sold At Discount $ 1
Foreign Exchange Forward Contracts [Member]  
Derivatives, Fair Value [Line Items]  
Term Of Foreign Currency Forward Purchase And Sales Contacts (less than one year) 1 year
Derivative Instruments in Hedges, Liabilities, at Fair Value $ 1