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Financing Arrangements - Long-term debt - Stated value (Details 3) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Aug. 19, 2021
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | $ 3,379.0 |  | $ 3,362.1 |  |
Fair value adjustment of debt | 3.7 |  | 5.4 |  |
Debt Instrument, Unamortized Discount | 5.1 |  | 5.8 |  |
Total long term debt | 3,377.6 |  | 3,361.7 |  |
Stated value of current portion of issued debt | 45.4 |  | 129.2 |  |
Fair value adjustment of current portion of long-term debt | 0.4 |  | 1.3 |  |
Debt Instrument, Unamortized Discount, Current | 0.5 |  | 0.4 |  |
Carrying Value, current portion | 45.3 |  | 130.1 |  |
Stated value of noncurrent portion of issued debt | 3,333.6 |  | 3,232.9 |  |
Fair Market Value Adjustment, Total long term debt noncurrent | 3.3 |  | 4.1 |  |
Debt Instrument, Unamortized Discount, Noncurrent | 4.6 |  | 5.4 |  |
Total long-term debt, less current maturities | 3,332.3 |  | $ 3,231.6 |  |
Letters of Credit Outstanding, Amount | $ 50.0 |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.15% |  | 0.15% | 0.15% |
Servicing Liability | $ 0.0 |  | $ 0.0 |  |
The Mosaic Credit Facility amount of revolving credit loans |  |  |  |  | $ 2,500.0
Maturities of Long-term Debt |  |  |  |  |
2025 | 45.3 |  |  |  |
2026 | 33.8 |  |  |  |
2027 | 717.5 |  |  |  |
2028 | 561.0 |  |  |  |
2029 | 57.2 |  |  |  |
Thereafter | 1,962.8 |  |  |  |
Total long term debt | 3,377.6 |  | 3,361.7 |  |
Mosaic Credit Facility |  |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Letters of Credit Outstanding, Amount | 0.0 |  | 10.5 |  |
Line of Credit Facility, Commitment Fee Amount | $ 3.8 |  | $ 3.8 | $ 3.8 |
Senior Notes | Senior Notes Due 2027 [Member] |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 4.05% |  |  |  |
Long term debt including current maturities | $ 700.0 |  |  |  |
Senior Notes | Senior Notes Due 2033 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 5.45% |  |  |  |
Long term debt including current maturities | $ 500.0 |  |  |  |
Senior Notes | Senior Notes Due 2043 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 5.625% |  |  |  |
Long term debt including current maturities | $ 600.0 |  |  |  |
Senior Notes | Senior Notes Due 2041 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 4.875% |  |  |  |
Long term debt including current maturities | $ 300.0 |  |  |  |
Senior Notes | Senior Notes Due 2023 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate |  |  | 4.25% |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Repayments of Subordinated Debt |  |  | $ 900.0 |  |
Senior Notes | Senior Notes Due 2028 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 5.375% |  |  |  |
Long term debt including current maturities | $ 400.0 |  |  |  |
Debentures | Debentures Due 2028 |  |  |  |  |
Stated interest rates: |  |  |  |  |
Long term debt including current maturities | $ 147.1 |  |  |  |
Unsecured Notes |  |  |  |  |
Stated interest rates: |  |  |  |  |
Effective interest rate | 5.49% |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | $ 2,500.0 |  | 2,500.0 |  |
Fair value adjustment of debt | 0.0 |  | 0.0 |  |
Debt Instrument, Unamortized Discount | 5.1 |  | 5.8 |  |
Total long term debt | 2,494.9 |  | 2,494.2 |  |
Maturities of Long-term Debt |  |  |  |  |
Total long term debt | $ 2,494.9 |  | 2,494.2 |  |
Unsecured Notes | Minimum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 4.05% |  |  |  |
Unsecured Notes | Maximum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 5.63% |  |  |  |
Unsecured Debentures |  |  |  |  |
Stated interest rates: |  |  |  |  |
Effective interest rate | 7.19% |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | $ 147.1 |  | 147.1 |  |
Fair value adjustment of debt | 0.3 |  | 0.4 |  |
Debt Instrument, Unamortized Discount | 0.0 |  | 0.0 |  |
Total long term debt | 147.4 |  | 147.5 |  |
Maturities of Long-term Debt |  |  |  |  |
Total long term debt | $ 147.4 |  | 147.5 |  |
Unsecured Debentures | Maximum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 7.30% |  |  |  |
Finance Leases |  |  |  |  |
Stated interest rates: |  |  |  |  |
Effective interest rate | 5.75% |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | $ 144.8 |  | 180.0 |  |
Fair value adjustment of debt | 0.0 |  | 0.0 |  |
Debt Instrument, Unamortized Discount | 0.0 |  | 0.0 |  |
Total long term debt | 144.8 |  | 180.0 |  |
Maturities of Long-term Debt |  |  |  |  |
Total long term debt | $ 144.8 |  | 180.0 |  |
Finance Leases | Minimum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 0.77% |  |  |  |
Finance Leases | Maximum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 13.02% |  |  |  |
Other |  |  |  |  |
Stated interest rates: |  |  |  |  |
Effective interest rate | 5.59% |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | $ 17.1 | [1] | 35.0 |  |
Fair value adjustment of debt | 3.4 |  | 5.0 |  |
Debt Instrument, Unamortized Discount | 0.0 |  | 0.0 |  |
Total long term debt | 20.5 | [1] | 40.0 |  |
Maturities of Long-term Debt |  |  |  |  |
Total long term debt | $ 20.5 | [1] | 40.0 |  |
Other | Minimum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 6.53% |  |  |  |
Other | Maximum |  |  |  |  |
Stated interest rates: |  |  |  |  |
Stated interest rate | 8.00% |  |  |  |
Term Loan |  |  |  |  |
Stated interest rates: |  |  |  |  |
Effective interest rate | 7.08% |  |  |  |
Senior Loans | Senior Unsecured Term Loan Facility |  |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
The Mosaic Credit Facility amount of revolving credit loans | $ 700.0 |  |  |  |
Long-Term Line of Credit | 570.0 |  | 500.0 |  |
Senior Unsecured Term Loan Facility |  |  |  |  |
Long-term Debt, Excluding Current Maturities |  |  |  |  |
Stated value of issued debt | 570.0 |  | 500.0 |  |
Fair value adjustment of debt | 0.0 |  | 0.0 |  |
Debt Instrument, Unamortized Discount | 0.0 |  | 0.0 |  |
Total long term debt | 570.0 |  | 500.0 |  |
Maturities of Long-term Debt |  |  |  |  |
Total long term debt | $ 570.0 |  | $ 500.0 |  |
[1] | Includes deferred financing fees related to our long-term debt.

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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482949/835-30-55-8 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)(a)(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482900/835-30-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-6 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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