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Foreign Currency Translation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Sep. 30, 2013
Feb. 13, 2013
Feb. 12, 2013
Dec. 31, 2012
Foreign Currency Translation [Line Items]          
Foreign currency exchange rate     6.30 4.30  
Foreign exchange loss $ (6.5)        
Assets   2,237.7     2,420.4
Venezuelan Subsidiary
         
Foreign Currency Translation [Line Items]          
Assets   $ 14.6