Derivative Instruments And Risk Management (Fair Value Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011
Derivatives Designated As Hedging Instruments [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	$ (0.1)	$ (0.2)
Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Asset Derivatives, Fair Value	1.4	1.2
Derivatives Not Designated As Hedging Instruments [Member] | Selling, General And Administrative Expenses [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	1.5	3.1
Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Asset Derivatives, Fair Value	2.1	2.0
Diesel Fuel Contracts [Member] | Derivatives Designated As Hedging Instruments [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	0.4	0.4
Diesel Fuel Contracts [Member] | Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Notional Amount	2.9
Asset Derivatives, Fair Value	0.9	0.1
Foreign Exchange Contracts [Member] | Derivatives Designated As Hedging Instruments [Member] | Other Comprehensive Income (Loss) [Member]
Derivative [Line Items]
Amount of Gains (Loss) Recognized in OCI from Derivatives	(0.5)	(0.6)
Foreign Exchange Contracts [Member] | Derivatives Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Notional Amount	24.8
Asset Derivatives, Fair Value	0.5	1.1
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Selling, General And Administrative Expenses [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	0.1	1.1
Foreign Exchange Contracts [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Notional Amount	4.0
Asset Derivatives, Fair Value	0.1	0
Equity Derivatives [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Selling, General And Administrative Expenses [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income	1.4	2.0
Equity Derivatives [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Other Current Assets [Member]
Derivative [Line Items]
Notional Amount	18.7
Asset Derivatives, Fair Value	$ 2.0	$ 2.0