Fair Value of Derivative Instruments and Effect of Such Derivative Instruments on Consolidated Statements of Income and on Other Comprehensive Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 0.4		$ 0.4		$ 0.8
Liability Derivatives, Fair Value	0.9		0.9		0
Amount of Gains (Loss) Recognized in OCI	(0.9)	(0.1)	(0.9)	0.2
Designated as Hedging Instrument | Diesel fuel contracts
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI	0	(0.4)	(0.2)	(0.2)
Designated as Hedging Instrument | Diesel fuel contracts | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	2.9		2.9
Asset Derivatives, Fair Value	0.2		0.2		0.3
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI	(0.9)	0.3	(0.7)	0.4
Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	5.3		5.3
Asset Derivatives, Fair Value	0.2		0.2		0.5
Designated as Hedging Instrument | Foreign Exchange Contract | Accounts Payable and Accrued Expenses
Derivative [Line Items]
Liability Derivatives, Notional Amount	43.1		43.1
Liability Derivatives, Fair Value	0.9		0.9		0
Not Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	0.5		0.5		2.4
Amount of Gain (Loss) Recognized in Income	0.3	(1.3)	1.3	3.3
Not Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	3.9		3.9
Asset Derivatives, Fair Value	0.2		0.2		0
Not Designated as Hedging Instrument | Equity derivatives | Selling, General and Administrative Expenses
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	0.3	(1.3)	1.3	3.3
Not Designated as Hedging Instrument | Equity derivatives | Other Current Assets
Derivative [Line Items]
Asset Derivatives, Notional Amount	26.5		26.5
Asset Derivatives, Fair Value	$ 0.3		$ 0.3		$ 2.4