Acquisitions - Pro Forma Information (Details) - Cheminova [Member] - USD ($) $ / shares in Units, $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Business Acquisition [Line Items]
Pro forma Revenue	$ 945.0		$ 1,150.0	$ 1,908.0	$ 2,245.0
Pro forma Diluted earnings per share (in dollars per share)	$ 5.68		$ 0.98	$ 6.17	$ 1.57
Acquisition-related Costs [Member]
Business Acquisition [Line Items]
Acquisition and integration related costs	$ 40.3	[1]		$ 231.0

[1] Fair value of finished good inventories acquired included a step-up in the value of approximately $58.1 million, of which $19.3 million was expensed in the three and six months ended June 30, 2015 and included in "Cost of sales and services" on the condensed consolidated income statement.