Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill [Roll Forward]
Goodwill, Beginning Balance	$ 4,021.9
Addition from acquisitions	66.9	$ 1,769.9
Purchase accounting adjustments	3.8
Foreign currency translation	155.3
Goodwill, Ending Balance	4,247.9	2,981.7
Performance Materials
Goodwill [Roll Forward]
Goodwill, Beginning Balance	2,147.2
Addition from acquisitions	66.9
Purchase accounting adjustments	3.6
Foreign currency translation	34.2
Goodwill, Ending Balance	2,251.9
ArgoSolutions
Goodwill [Roll Forward]
Goodwill, Beginning Balance	1,874.7
Addition from acquisitions	0.0	1,769.9
Purchase accounting adjustments	0.2
Foreign currency translation	121.1
Goodwill, Ending Balance	$ 1,996.0	$ 2,059.6