| Component: (Network and Table) | |
|---|---|
| Network | 2413402 - Disclosure - Accounting for Asset Retirement Obligations (Details) (http://www.mosaicco.com/role/AccountingForAssetRetirementObligationsDetails)  | 
| Table | (Implied) | 
| Reporting Entity [Axis] | 0001285785 (http://www.sec.gov/CIK) | 
| Asset Retirement Obligation Disclosure [Abstract] | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31  | 2015-01-01 - 2015-12-31  | 2014-01-01 - 2014-12-31  | |
Asset Retirement Obligation Disclosure [Abstract]  | |||
Asset retirement obligations, beginning of period  | |||
Liabilities incurred  | |||
Liabilities settled  | (  | (  | |
Accretion expense  | 40,400,000    | 32,400,000    | 42,100,000    | 
Revisions in estimated cash flows  | |||
Foreign currency translation  | |||
Asset retirement obligations, end of period  | 841,600,000    | 859,500,000    | |
Less current portion  | 102,000,000    | 91,900,000    | |
Asset retirement obligations  | 747,900,000    | 749,700,000    | |