v3.26.1
Business Segments (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2026
USD ($)
financialinstitution
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Disaggregation of Revenue [Line Items]      
Net sales [1] $ 2,998.0 $ 2,620.9  
Intersegment net sales 0.0 0.0  
Net sales 2,998.0 2,620.9  
Cost of goods sold [2] 2,762.4 2,132.5  
Gross margin 235.6 488.4  
Canadian resource taxes 66.8 47.3  
Gross margin (excluding Canadian resource taxes) 302.4 535.7  
Selling, general and administrative expenses [3] 135.9 122.6  
Loss on assets to be sold 232.6 0.0  
Other operating expense [4] 240.0 27.3  
Operating earnings (loss) (372.9) 338.5  
Capital expenditures 356.8 340.8  
Depreciation, depletion and amortization 316.6 243.0  
Assets $ 24,568.5   $ 24,480.1
Number of Reportable Segments | financialinstitution 3    
Phosphate      
Disaggregation of Revenue [Line Items]      
Net sales $ 1,211.8 964.8  
Intersegment net sales 214.2 133.8  
Net sales 1,426.0 1,098.6  
Cost of goods sold [2] 1,422.6 931.3  
Gross margin 3.4 167.3  
Canadian resource taxes 0.0 0.0  
Gross margin (excluding Canadian resource taxes) 3.4 167.3  
Selling, general and administrative expenses [3] 12.9 12.1  
Loss on assets to be sold 0.0    
Other operating expense [4] 38.4 15.8  
Operating earnings (loss) (47.9) 139.4  
Capital expenditures 222.0 236.3  
Depreciation, depletion and amortization 151.0 113.2  
Assets 10,200.7   10,239.0
Potash      
Disaggregation of Revenue [Line Items]      
Net sales 671.4 570.2  
Intersegment net sales (4.0) 0.0  
Net sales 667.4 570.2  
Cost of goods sold [2] 476.1 401.6  
Gross margin 191.3 168.6  
Canadian resource taxes 66.8 47.3  
Gross margin (excluding Canadian resource taxes) 258.1 215.9  
Selling, general and administrative expenses [3] 8.6 7.8  
Loss on assets to be sold 0.0    
Other operating expense [4] 5.7 4.1  
Operating earnings (loss) 176.9 156.8  
Capital expenditures 48.7 45.1  
Depreciation, depletion and amortization 89.8 81.0  
Assets 6,464.9   6,610.6
Mosaic Fertilizantes      
Disaggregation of Revenue [Line Items]      
Net sales 937.1 933.8  
Intersegment net sales 0.0 0.0  
Net sales 937.1 933.8  
Cost of goods sold [2] 902.5 806.8  
Gross margin 34.6 127.0  
Canadian resource taxes 0.0 0.0  
Gross margin (excluding Canadian resource taxes) 34.6 127.0  
Selling, general and administrative expenses [3] 36.1 23.2  
Loss on assets to be sold 232.6    
Other operating expense [4] 188.0 5.3  
Operating earnings (loss) (422.1) 98.5  
Capital expenditures 85.5 59.2  
Depreciation, depletion and amortization 65.9 38.1  
Assets 4,725.0   4,618.5
Corporate, Eliminations and Other      
Disaggregation of Revenue [Line Items]      
Net sales 177.7 152.1  
Intersegment net sales (210.2) (133.8)  
Net sales (32.5) 18.3  
Cost of goods sold [2] (38.8) (7.2)  
Gross margin 6.3 25.5  
Canadian resource taxes 0.0 0.0  
Gross margin (excluding Canadian resource taxes) 6.3 25.5  
Selling, general and administrative expenses [3] 78.3 79.5  
Loss on assets to be sold 0.0    
Other operating expense [4] 7.9 2.1  
Operating earnings (loss) (79.8) (56.2)  
Capital expenditures 0.6 0.2  
Depreciation, depletion and amortization 9.9 10.7  
Assets 3,177.9   $ 3,012.0
Corporate, Eliminations and Other | China and India      
Disaggregation of Revenue [Line Items]      
Net sales 177.0 147.4  
Gross margin $ 21.4 $ 20.3  
[1] Revenues are attributed to countries based on location of customer.
[2] The primary components of cost of goods sold are raw material purchases, including sulfur and ammonia, conversion costs and transportation costs.
[3] Selling, general and administrative expenses include nonmanufacturing payroll expense and professional services expense.
[4] Other operating expenses typically relate to five major categories: (1) AROs, (2) environmental and legal reserves, (3) idle facility costs, (4) insurance reimbursements, and (5) gain/loss on sale or disposal of fixed assets. In the first quarter of 2026, this specifically includes expenses such as contract terminations, impairment of property, plant and equipment, inventory write-offs and severance costs as a result of the decision to divest of the Araxá mining and chemical complex and idle the related mining activities at the Patrocínio complex in Brazil.