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Quarterly Results Narrative (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Quarterly Financial Information Disclosure [Abstract]      
Adjustment to gross profit $ 1pro_Adjustmenttogrossprofit $ 1pro_Adjustmenttogrossprofit $ 1pro_Adjustmenttogrossprofit