Fair Value of Derivative Instruments and Effect of Such Derivative Instruments on Consolidated Statements of Income and on Other Comprehensive Income (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) gal	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	$ 151.2
Designated as Hedging Instrument
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Fair Value	7.6	$ 2.8
Liability Derivatives, Fair Value	2.2	5.3
Amount of Gains (Loss) Recognized in OCI	4.7	(1.1)	$ 0.3
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	118.0
Amount of Gains (Loss) Recognized in OCI	3.2	1.9	0.2
Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	77.2
Asset Derivatives, Fair Value	5.0	2.8
Designated as Hedging Instrument | Foreign Exchange Contract | Other Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	29.9
Asset Derivatives, Fair Value	1.3	0.0
Designated as Hedging Instrument | Foreign Exchange Contract | Deferred And Other Long Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Liability Derivatives, Notional Amount	10.9
Liability Derivatives, Fair Value	0.3	0.0
Designated as Hedging Instrument | Interest Rate Swaps | Other Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	300.0
Asset Derivatives, Fair Value	1.3	0.0
Designated as Hedging Instrument | Interest Rate Swaps | Deferred And Other Long Term Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Liability Derivatives, Fair Value	0.0	0.9
Designated as Hedging Instrument | Diesel fuel contracts
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Amount of Gains (Loss) Recognized in OCI	$ 1.5	(3.0)	0.1
Designated as Hedging Instrument | Diesel fuel contracts | Accounts Payable and Accrued Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Liability Derivatives, Notional Amount, Volume | gal	2.0
Liability Derivatives, Fair Value	$ 1.9	4.4
Not Designated as Hedging Instrument
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Fair Value	1.8	2.8
Liability Derivatives, Fair Value	0.1	0.0
Amount of Gain (Loss) Recognized in Income	5.5	4.7	5.2
Not Designated as Hedging Instrument | Foreign Exchange Contract | Other Income (Expense), Net
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income	3.4	0.0	(0.1)
Not Designated as Hedging Instrument | Foreign Exchange Contract | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Notional Amount	33.2
Asset Derivatives, Fair Value	1.8	0.0
Not Designated as Hedging Instrument | Equity derivatives | Selling, General and Administrative Expenses
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Amount of Gain (Loss) Recognized in Income	2.1	4.7	$ 5.3
Not Designated as Hedging Instrument | Equity derivatives | Other Current Assets
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Asset Derivatives, Fair Value	0.0	2.8
Not Designated as Hedging Instrument | Equity derivatives | Other Current Liabilities
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Liability Derivatives, Notional Amount	32.4
Liability Derivatives, Fair Value	$ 0.1	$ 0.0