Financing Arrangements - Short-term debt (Details)	7 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	May. 31, 2013 USD ($)
Short-term Debt
Total short-term debt		$ 25,500,000	$ 13,500,000
Line of Credit
Short-term Debt
Credit facility term		5 years
The Mosaic Credit Facility amount of revolving credit loans		$ 1,500,000,000.0
Line of credit facility, expiration date		Dec. 05, 2018
A failure to pay principal or interest under any one item of other indebtedness in excess of $50 million, or breach or default under such indebtedness that permits the holders thereof to accelerate the maturity thereof, will result in a cross-default in the Mosaic Credit Line		$ 50,000,000
A failure to pay principal or interest for multiple items of other indebtedness in excess of $75 million, or breach or default under such indebtedness that permits the holders thereof to accelerate the maturity thereof, will result in a cross-default in the Mosaic Credit Line		$ 75,000,000
Credit facility, debt to EBITDA ratio, maximum		3.5
Credit facility, interest coverage ratio, minimum		3.0
Letters of credit, amount outstanding		$ 18,700,000	23,100,000
Net available borrowings for revolving loans under the Mosaic Credit Facility		$ 1,481,300,000	$ 1,476,900,000
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	0.19%	0.125%	0.125%	0.20%
Line of Credit Facility, Commitment Fee Amount	$ 900,000	$ 1,900,000	$ 1,900,000	$ 1,500,000
Total short-term debt		$ 0	$ 0
Short Term Debt
Stated interest rates as of the balance sheet date:
Stated interest rates - lowest rate		1.20%
Stated interest rates - highest rate		9.50%
Letter Of Credit
Short-term Debt
Letters of credit, amount outstanding		$ 4,700,000