Goodwill and Intangible Assets, Net (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Goodwill [Line Items]          
Amortization of Intangible Assets $ 0.4 $ 0.4 $ 0.8 $ 0.8  
Goodwill 58.2   58.2   $ 55.7
Other          
Goodwill [Line Items]          
Goodwill 6.1   6.1   6.1
Plant Nutrition | Operating Segments          
Goodwill [Line Items]          
Goodwill $ 52.1   $ 52.1   $ 49.6