Business Combinations (Narrative) (Details) - USD ($) $ in Millions		6 Months Ended
	Jan. 29, 2016	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Business acquisitions		$ 72.8	$ 0.0
Kraton
Business Acquisition [Line Items]
Business acquisitions	$ 72.8
Goodwill acquired	37.8
Intangible assets acquired	$ 13.8
Kraton | Minimum
Business Acquisition [Line Items]
Intangible assets acquired, amortization period	7 years
Kraton | Maximum
Business Acquisition [Line Items]
Intangible assets acquired, amortization period	10 years