Restructuring and Impairment Expense (Asset Impairments) (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Restructuring and Impairment [Line Items]
Impairment expense	$ 66.5
Goodwill, impairment loss	8.4
Surface Integrated Services Canada
Restructuring and Impairment [Line Items]
Impairment expense	54.7
Fair Value, Measurements, Nonrecurring | Surface Integrated Services Canada
Restructuring and Impairment [Line Items]
Goodwill, impairment loss	8.4
Impairment of property, plant and equipment held-for-use	13.0
Property, plant and equipment, fair value		$ 39.4
Customer relationships | Fair Value, Measurements, Nonrecurring | Surface Integrated Services Canada
Restructuring and Impairment [Line Items]
Impairment of intangible assets, finite-lived	$ 33.3