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Contingencies - Additional Information (Detail) In Millions, unless otherwise specified	0 Months Ended	1 Months Ended			9 Months Ended	1 Months Ended
	May 08, 2012 USD ($)	Nov. 22, 2011 USD ($)	Nov. 22, 2011 BRL	Jun. 30, 2010 USD ($)	Sep. 30, 2013 BRL	Nov. 22, 2011 Court-imposed interest, fees or inflation adjustments Maximum USD ($)
Loss Contingencies [Line Items]
Damages asserted by BK					20.8
Total ordered damages granted to Bk		11.8	26.7			49.0
Amount of remediation plan for the RID portion of the Superfund Site approved by ADEQ				100
Walker acquisition, Purchase price	377.0
Business Acquisition Outstanding claims for unpaid benefits owed By Seller	$ 2.9

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Amount of damages awarded to the plaintiff in the legal matter.

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The value (monetary amount) of the award the plaintiff seeks in the legal matter.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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This item refers to the outstanding claims for unpaid benefits owed By Seller related to acquisition.

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Environmental Remediation Cost Amount Approved

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