Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 0.7		$ 0.8
Amount of Gains (Loss) Recognized in OCI	0	0.3
Designated as Hedging Instrument | Diesel Fuel Contracts | Other Comprehensive Income (Loss)
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI	(0.2)	0.1
Designated as Hedging Instrument | Diesel Fuel Contracts | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	4.2
Asset Derivatives, Fair Value	0.1		0.3
Designated as Hedging Instrument | Foreign Exchange Contract | Other Comprehensive Income (Loss)
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI	0.2	0.2
Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	38.9
Asset Derivatives, Fair Value	0.6		0.5
Not Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	0.1		2.4
Amount of Gain (Loss) Recognized in Income	1.0	4.6
Not Designated as Hedging Instrument | Equity Derivatives | Selling, General And Administrative Expenses
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	1.0	4.6
Not Designated as Hedging Instrument | Equity Derivatives | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	26.4
Asset Derivatives, Fair Value	$ 0.1		$ 2.4