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History of Remeasurement Losses, Deconsolidation Loss and Historical Operating Results and Financial Position of Venezuelan Subsidiaries (Parenthetical) (Detail) - VEF / $
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Mar. 31, 2013
Venezuela [Line Items]        
Foreign currency exchange rate translation 12.00 11.50 10.70 6.30