Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 1.0	$ 1.3	$ 3.3	$ 3.1
Acquired Indefinite-lived Intangible Assets [Line Items]
Goodwill	60.0		60.0		$ 68.5
Plant Nutrition [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 53.6		$ 53.6		$ 62.0
Supply Agreement [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			50 years
SOP Production Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			25 years
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			10 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			20 years
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			5 years
Lease Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			25 years
Customer and Distributor Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			10 years
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			10 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated Lives			5 years