Schedule of Notional Amounts (Details) gal in Millions, $ in Millions	Mar. 31, 2016 USD ($) gal	Dec. 31, 2015 USD ($) gal
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 128.7	$ 118.0
Designated as Hedging Instrument | Interest Rate Swaps
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 300.0	$ 300.0
Designated as Hedging Instrument | Diesel fuel contracts
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount, Volume | gal	1.5	2.0
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 25.1	$ 33.2
Not Designated as Hedging Instrument | Equity derivatives
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 32.6	$ 32.4