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History of Remeasurement Losses, Deconsolidation Loss and Historical Operating Results and Financial Position of Venezuelan Subsidiaries (Parenthetical) (Detail)
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2013
Dec. 31, 2012
Venezuela [Line Items]            
Foreign currency exchange rate translation 12.00 11.50 10.70 6.30 6.30 4.30