Business Segments (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2026
USD ($)
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Jun. 30, 2025
USD ($)
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Jun. 30, 2026
USD ($)
financialinstitution
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Jun. 30, 2025
USD ($)
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Dec. 31, 2025
USD ($)
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| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | [1] | $ 2,824.1 | $ 3,005.7 | $ 5,822.1 | $ 5,626.6 | ||||||||
| Intersegment net sales | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||
| Net sales | 2,824.1 | 3,005.7 | 5,822.1 | 5,626.6 | |||||||||
| Cost of goods sold | [2] | 2,609.4 | 2,487.1 | 5,371.8 | 4,619.6 | ||||||||
| Gross margin | 214.7 | 518.6 | 450.3 | 1,007.0 | |||||||||
| Canadian resource taxes | 70.4 | 61.7 | 137.2 | 109.0 | |||||||||
| Gross margin (excluding Canadian resource taxes) | 285.1 | 580.3 | 587.5 | 1,116.0 | |||||||||
| Selling, general and administrative expenses | [3] | 131.6 | 167.2 | 267.5 | 289.8 | ||||||||
| Loss on assets sold and to be sold | 6.2 | 0.0 | 238.8 | 0.0 | |||||||||
| Other operating expense | [4] | 112.4 | 107.0 | 352.4 | 134.3 | ||||||||
| Operating earnings (loss) | (35.5) | 244.4 | (408.4) | 582.9 | |||||||||
| Capital expenditures | 320.3 | 304.6 | 677.1 | 645.4 | |||||||||
| Depreciation, depletion and amortization | 292.1 | 261.7 | 608.7 | 504.7 | |||||||||
| Assets | 24,640.7 | $ 24,640.7 | $ 24,480.1 | ||||||||||
| Number of Reportable Segments | financialinstitution | 3 | ||||||||||||
| Phosphate | |||||||||||||
| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | 968.7 | 984.6 | $ 2,180.5 | 1,949.4 | |||||||||
| Intersegment net sales | 277.6 | 188.4 | 491.8 | 322.2 | |||||||||
| Net sales | 1,246.3 | 1,173.0 | 2,672.3 | 2,271.6 | |||||||||
| Cost of goods sold | [2] | 1,250.8 | 1,070.0 | 2,673.4 | 2,001.3 | ||||||||
| Gross margin | (4.5) | 103.0 | (1.1) | 270.3 | |||||||||
| Canadian resource taxes | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||
| Gross margin (excluding Canadian resource taxes) | (4.5) | 103.0 | (1.1) | 270.3 | |||||||||
| Selling, general and administrative expenses | [3] | 12.2 | 12.4 | 25.1 | 24.5 | ||||||||
| Loss on assets sold and to be sold | 0.0 | 0.0 | |||||||||||
| Other operating expense | [4] | 87.1 | 98.5 | 125.5 | 114.3 | ||||||||
| Operating earnings (loss) | (103.8) | (7.9) | (151.7) | 131.5 | |||||||||
| Capital expenditures | 201.2 | 184.7 | 423.2 | 421.0 | |||||||||
| Depreciation, depletion and amortization | 132.5 | 129.2 | 283.5 | 242.4 | |||||||||
| Assets | 10,196.8 | 10,196.8 | 10,239.0 | ||||||||||
| Other Nonrecurring Expense | 69.0 | 69.0 | |||||||||||
| Potash | |||||||||||||
| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | 639.7 | 711.7 | 1,311.1 | 1,281.9 | |||||||||
| Intersegment net sales | 10.6 | (1.2) | 6.6 | (1.2) | |||||||||
| Net sales | 650.3 | 710.5 | 1,317.7 | 1,280.7 | |||||||||
| Cost of goods sold | [2] | 443.0 | 501.1 | 919.1 | 902.7 | ||||||||
| Gross margin | 207.3 | 209.4 | 398.6 | 378.0 | |||||||||
| Canadian resource taxes | 70.4 | 61.7 | 137.2 | 109.0 | |||||||||
| Gross margin (excluding Canadian resource taxes) | 277.7 | 271.1 | 535.8 | 487.0 | |||||||||
| Selling, general and administrative expenses | [3] | 6.8 | 8.3 | 15.4 | 16.1 | ||||||||
| Loss on assets sold and to be sold | 1.7 | 1.7 | |||||||||||
| Other operating expense | [4] | 3.3 | 6.9 | 9.1 | 11.0 | ||||||||
| Operating earnings (loss) | 195.5 | 194.1 | 372.4 | 350.9 | |||||||||
| Capital expenditures | 67.8 | 73.2 | 116.5 | 118.3 | |||||||||
| Depreciation, depletion and amortization | 76.3 | 79.4 | 166.1 | 160.4 | |||||||||
| Assets | 6,262.7 | 6,262.7 | 6,610.6 | ||||||||||
| Mosaic Fertilizantes | |||||||||||||
| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | 1,033.8 | 1,174.9 | 1,970.9 | 2,108.7 | |||||||||
| Intersegment net sales | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||
| Net sales | 1,033.8 | 1,174.9 | 1,970.9 | 2,108.7 | |||||||||
| Cost of goods sold | [2] | 1,027.6 | 1,013.2 | 1,930.1 | 1,820.0 | ||||||||
| Gross margin | 6.2 | 161.7 | 40.8 | 288.7 | |||||||||
| Canadian resource taxes | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||
| Gross margin (excluding Canadian resource taxes) | 6.2 | 161.7 | 40.8 | 288.7 | |||||||||
| Selling, general and administrative expenses | [3] | 32.1 | 61.2 | 68.2 | 84.4 | ||||||||
| Loss on assets sold and to be sold | 0.0 | 232.6 | |||||||||||
| Other operating expense | [4] | 14.9 | (8.5) | 202.9 | (3.2) | ||||||||
| Operating earnings (loss) | (40.8) | 109.0 | (462.9) | 207.5 | |||||||||
| Capital expenditures | 47.4 | 45.6 | 132.9 | 104.8 | |||||||||
| Depreciation, depletion and amortization | 73.9 | 43.9 | 139.8 | 82.0 | |||||||||
| Assets | 4,983.5 | 4,983.5 | 4,618.5 | ||||||||||
| Corporate, Eliminations and Other | |||||||||||||
| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | 181.9 | 134.5 | 359.6 | 286.6 | |||||||||
| Intersegment net sales | (288.2) | (187.2) | (498.4) | (321.0) | |||||||||
| Net sales | (106.3) | (52.7) | (138.8) | (34.4) | |||||||||
| Cost of goods sold | [2] | (112.0) | (97.2) | (150.8) | (104.4) | ||||||||
| Gross margin | 5.7 | 44.5 | 12.0 | 70.0 | |||||||||
| Canadian resource taxes | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||
| Gross margin (excluding Canadian resource taxes) | 5.7 | 44.5 | 12.0 | 70.0 | |||||||||
| Selling, general and administrative expenses | [3] | 80.5 | 85.3 | 158.8 | 164.8 | ||||||||
| Loss on assets sold and to be sold | 4.5 | 4.5 | |||||||||||
| Other operating expense | [4] | 7.1 | 10.1 | 14.9 | 12.2 | ||||||||
| Operating earnings (loss) | (86.4) | (50.8) | (166.2) | (107.0) | |||||||||
| Capital expenditures | 3.9 | 1.1 | 4.5 | 1.3 | |||||||||
| Depreciation, depletion and amortization | 9.4 | 9.2 | 19.3 | 19.9 | |||||||||
| Assets | 3,197.7 | 3,197.7 | $ 3,012.0 | ||||||||||
| Corporate, Eliminations and Other | China and India | |||||||||||||
| Disaggregation of Revenue [Line Items] | |||||||||||||
| Net sales | 179.9 | 132.4 | 356.9 | 279.9 | |||||||||
| Gross margin | $ 20.1 | $ 19.7 | $ 41.6 | $ 40.0 | |||||||||
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| X | ||||||||||
- Definition Canadian resource tax expense consisting of provincial taxes on potash production and a resource surcharge based on the value of resource sales from Saskatchewan mines. No definition available.
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity, excluding Canadian resource taxes. No definition available.
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- Definition Intersegment Sales No definition available.
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- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of other expense that is infrequent in occurrence or unusual in nature. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations. No definition available.
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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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