Financing Arrangements Financing Arrangements	6 Months Ended
Financing Arrangements Financing Arrangements	Jun. 30, 2020
Financing Arrangements [Abstract]
Debt Disclosure	Financing Arrangements Structured Accounts Payable Arrangements In Brazil, we finance some of our potash-based fertilizer, sulfur, ammonia and other raw material product purchases through third-party financing arrangements. These arrangements provide that the third-party intermediary advance the amount of the scheduled payment to the vendor, less an appropriate discount, at a scheduled payment date and Mosaic makes payment to the third-party intermediary at a later date, stipulated in accordance with the commercial terms negotiated. As of June 30, 2020 and December 31, 2019, the total structured accounts payable arrangements were $410.3 million and $740.6 million, respectively. Inventory Financing Arrangement On January 7, 2020, we entered into an inventory financing arrangement with a bank to sell up to $400 million of certain commodities inventory for cash and subsequently repurchase the inventory at an agreed upon price and time in the future, not to exceed 180 days. Under the terms of the agreement, we may borrow up to 90% of the value of the inventory. It is later repurchased by Mosaic at the original sale price plus interest and any transaction costs. As of June 30, 2020, $250.0 million of inventory was financed under this arrangement, which is included in short-term debt on the Condensed Consolidated Balance Sheet. The inventory remains on our Condensed Consolidated Balance Sheet as it serves as collateral for the debt. Interest accrues on the debt through the repurchase date, and is included in accrued liabilities. The weighted average interest rate of the repurchase obligation as of June 30, 2020 was 1.91%. Receivable Purchasing Arrangement On March 4, 2020, we entered into a Receivable Purchasing Agreement ("RPA"), with a bank whereby, from time-to-time, we sell certain receivables. The net face value of the purchased receivables may not exceed $150 million at any point in time. The purchase price of the receivable sold under the RPA is the face value of the receivable less an agreed upon discount. We record the purchase price as short-term debt, and recognize interest expense by accreting the liability through the due date of the underlying receivables. As of June 30, 2020, we had non-recourse short-term debt of $99.9 million related to the RPA. Following the sale to the bank, we continue to service the collection of the receivables on behalf of the bank without further consideration. The weighted average interest rate of the RPA related debt as of June 30, 2020 was 1.27%. Mosaic Credit Facility Subsequent to quarter end, we entered into a First Amendment to Second Amended and Restated Credit Agreement, Extension Agreement, and Increase Agreement (the “First Amendment”) to our unsecured revolving credit facility, dated as of November 18, 2016 (the “Mosaic Credit Facility”). The First Amendment extends the maturity date of the Mosaic Credit Facility by one year, to November 18, 2022, and increases the revolving credit facility from $2.0 billion to $2.2 billion. The First Amendment also makes certain adjustments to the interest rate margins and pricing grid in a manner congruent with the investment ratings of the Company. No changes were made to the covenants in the Mosaic Credit Facility with respect to interest coverage and leverage ratio requirements pursuant to the First Amendment. There are no borrowings outstanding under the Mosaic Credit Facility, and the net amount available for borrowing is approximately $2.2 billion, reflecting letters of credit outstanding under the Mosaic Credit Facility of approximately $13.1 million. Unused commitment fees under the Mosaic Credit Facility currently accrue at an annual rate of 0.40%.