Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Not Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 0.9	$ 2.0
Amount of Gain (Loss) Recognized in Income	1.6	3.8	0.7
Not Designated as Hedging Instrument | Other Current Assets | Equity Derivatives
Derivative [Line Items]
Asset Derivatives, Notional Amount	21.6
Asset Derivatives, Fair Value	0.9	2.0
Not Designated as Hedging Instrument | Other Current Assets | Foreign Exchange Contract
Derivative [Line Items]
Asset Derivatives, Notional Amount	1.9
Asset Derivatives, Fair Value	0	0
Designated as Hedging Instrument
Derivative [Line Items]
Asset Derivatives, Fair Value	0.3	1.2
Amount of Gains (Loss) Recognized in OCI from Derivatives	0.9	1.2	3.4
Designated as Hedging Instrument | Other Current Assets | Foreign Exchange Contract
Derivative [Line Items]
Asset Derivatives, Notional Amount	34.7
Asset Derivatives, Fair Value	0.1	1.1
Designated as Hedging Instrument | Other Current Assets | Diesel Fuel Contracts
Derivative [Line Items]
Asset Derivatives, Notional Amount	7.1
Asset Derivatives, Fair Value	0.2	0.1
Selling, General And Administrative Expenses | Not Designated as Hedging Instrument | Equity Derivatives
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	3.1	3.9	1.4
Selling, General And Administrative Expenses | Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	(1.5)	(0.1)	(0.2)
Cost of Sales | Not Designated as Hedging Instrument | Diesel Fuel Contracts
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	0	0	(0.5)
Other Comprehensive Income (Loss) | Designated as Hedging Instrument | Foreign Exchange Contract
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	0.8	1.5	(0.1)
Other Comprehensive Income (Loss) | Designated as Hedging Instrument | Diesel Fuel Contracts
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	0.1	(0.3)	0.4
Other Comprehensive Income (Loss) | Designated as Hedging Instrument | Interest Rate Collars And Swaps
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	$ 0	$ 0	$ 3.1