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Document and Entity Information
Nov. 04, 2025
May 06, 2025
Cover [Abstract]    
Document Type   8-K
Document Period End Date Nov. 04, 2025  
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