Commitments And Contingencies - Additional Information (Detail) BRL in Millions, $ in Millions	1 Months Ended		12 Months Ended
	Nov. 22, 2011 USD ($)	Nov. 22, 2011 BRL	Dec. 31, 2015 USD ($)	Dec. 31, 2015 BRL	May. 31, 2012 USD ($)	Jun. 30, 2010 USD ($)
Loss Contingencies [Line Items]
Damages asserted by BK | BRL				BRL 20.8
Accrual for Environmental Loss Contingencies						$ 100.0
Business combination, recognized identifiable assets acquired and liabilities assumed, contingent liability					$ 2.9
Purchase Obligation			$ 72.4
Court-Imposed Interest, Fees or Inflation Adjustments
Loss Contingencies [Line Items]
Total ordered damages granted to Bk	$ 6.9
Court-Imposed Interest, Fees or Inflation Adjustments | Maximum
Loss Contingencies [Line Items]
Damages asserted by BK	$ 48.0
Total ordered damages granted to Bk | BRL		BRL 26.7
Arizona Department Of Environmental Quality
Loss Contingencies [Line Items]
Damages asserted by BK			0.2
Loss Contingency, Estimate of Possible Loss			0.5
Standby Letters Of Credit
Loss Contingencies [Line Items]
Letters of Credit Outstanding, Amount			$ 6.0