Acquisitions and Divestitures - 2015 Narrative (Details) $ in Millions		12 Months Ended
	May 01, 2016 USD ($)	Dec. 31, 2015 USD ($) acquisition	Dec. 31, 2016 USD ($)	Sep. 01, 2015 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Total current assets held for sale		$ 5.5	$ 0.0
Total non-current assets held for sale		36.5	0.0
Goodwill		675.8	835.8		$ 653.3
Total current liabilities held for sale		5.6	0.0
Total non-current liabilities held for sale		5.0	0.0
2015 Acquisitions
Business Acquisition [Line Items]
Goodwill		39.4
Purchase price		102.3
Goodwill anticipated to be deductible for tax purposes		1.7
Identifiable intangible assets		25.9
2015 Acquisitions | Trademark/Trade name rights
Business Acquisition [Line Items]
Identifiable intangible assets		0.9
2015 Acquisitions | Customer relationships
Business Acquisition [Line Items]
Identifiable intangible assets		$ 18.1
Weighted average amortizable lives of identifiable intangible assets		5 years 3 months 6 days
2015 Acquisitions | Supplier agreements
Business Acquisition [Line Items]
Identifiable intangible assets		$ 4.8
Weighted average amortizable lives of identifiable intangible assets		6 years 2 months 4 days
2015 Acquisitions | Other
Business Acquisition [Line Items]
Identifiable intangible assets		$ 2.1
Weighted average amortizable lives of identifiable intangible assets		3 years 4 months 8 days
Land segment
Business Acquisition [Line Items]
Goodwill		$ 430.7	496.7		405.9
Land segment | 2015 Acquisitions
Business Acquisition [Line Items]
Number of business acquired | acquisition		3
Aviation segment
Business Acquisition [Line Items]
Goodwill		$ 173.7	$ 266.8		$ 174.3
Aviation segment | 2015 Acquisitions
Business Acquisition [Line Items]
Number of business acquired | acquisition		1
Pester | Discontinued Operations, Held-for-sale
Business Acquisition [Line Items]
Total current assets held for sale		$ 5.5
Total non-current assets held for sale		36.5
Goodwill	$ 2.9			$ 5.9
Total current liabilities held for sale		5.6
Total non-current liabilities held for sale		$ 5.0
Pester | Discontinued Operations, Disposed of by Sale
Business Acquisition [Line Items]
Cash received for disposal of retail business	32.3
Pester | Discontinued Operations, Disposed of by Sale | Other income
Business Acquisition [Line Items]
Gain (loss) on disposal of retail business	$ 3.8