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Variable Interest Entities (Details)
$ in Millions
9 Months Ended
Sep. 30, 2015
USD ($)
Feb. 28, 2015
Dec. 31, 2014
USD ($)
Variable Interest Entity [Line Items]      
Number of VIE's   2  
Total assets $ 8,075.8   $ 4,547.3
Variable Interest Entity, Primary Beneficiary [Member] | Subsidiaries [Member]      
Variable Interest Entity [Line Items]      
Interest in entity 45.00%    
Variable Interest Entity, Primary Beneficiary [Member] | Saphyto S.A. [Member]      
Variable Interest Entity [Line Items]      
Equity of equity method investee $ 4.4    
Total assets $ 14.2    
Variable Interest Entity, Primary Beneficiary [Member] | Saphyto S.A. [Member] | Sale Of Platform Products [Member] | Product Concentration Risk [Member]      
Variable Interest Entity [Line Items]      
Percentage of sales that are Platform products 94.00%    
Variable Interest Entity, Not Primary Beneficiary [Member] | Minority Shareholder Of SPIA [Member]      
Variable Interest Entity [Line Items]      
Interest in entity 50.90%    
Variable Interest Entity, Not Primary Beneficiary [Member] | SPIA [Member]      
Variable Interest Entity [Line Items]      
Ownership percentage of equity investment 31.95%    
Equity of equity method investee $ 4.6    
Equity method investment on balance sheet 1.4    
Total assets $ 4.6    
Variable Interest Entity, Not Primary Beneficiary [Member] | SPIA [Member] | Sale Of Platform Products [Member] | Product Concentration Risk [Member]      
Variable Interest Entity [Line Items]      
Percentage of sales that are Platform products 90.00%