Organization and Nature of Business (Details)
3 Months Ended
Mar. 31, 2015
Miski Mayo Joint Venture [Member]  
Schedule of Equity Method Investments [Line Items]  
Mosaic's ownership percentage 35.00%
Wa'ad Al Shamal Joint Venture [Member]  
Schedule of Equity Method Investments [Line Items]  
Mosaic's ownership percentage 25.00%
Percent of joint venture production Mosaic expects to market 25.00%