Schedule of Notional Amounts (Details) gal in Millions, $ in Millions	Jun. 30, 2017 USD ($) gal	Dec. 31, 2016 USD ($) gal
Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 111.3	$ 94.1
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 | Interest Rate Lock Agreements
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 400.0	$ 0.0
Designated as Hedging Instrument | Diesel fuel contracts
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount, Volume | gal	5.5	2.0
Not Designated as Hedging Instrument | Foreign Exchange Contract
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 0.0	$ 1.8
Not Designated as Hedging Instrument | Equity derivatives
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivatives, Notional Amount	$ 23.2	$ 34.4