Document and Entity Information
| Document and Entity Information | Dec. 31, 2023 | Dec. 15, 2023 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Dec. 15, 2023 | |
| Entity Registrant Name | MOSAIC CO | |
| Entity Incorporation, State or Country Code | DE | |
| Entity File Number | 001-32327 | |
| Entity Tax Identification Number | 20-1026454 | |
| Entity Address, Address Line One | 101 East Kennedy Blvd. | |
| Entity Address, Address Line Two | Suite 2500 | |
| Entity Address, City or Town | Tampa, | |
| Entity Address, State or Province | FL | |
| Entity Address, Postal Zip Code | 33602 | |
| City Area Code | 800 | |
| Local Phone Number | 918-8270 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of each class | Common Stock, par value $0.01 per share | |
| Trading Symbol | MOS | |
| Security Exchange Name | NYSE | |
| Entity Emerging Growth Company | false | |
| Entity Central Index Key | 0001285785 | |
| Amendment Flag | false | |
| Current Fiscal Year End Date | --12-31 |