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Share Repurchases (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 shares | Dec. 31, 2023 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) $ / shares shares | Dec. 31, 2021 USD ($)
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchased During Period, Value |  | $ 754.4 | $ 1,673.2 | $ 410.9
Stock Repurchased During Period, Shares | shares |  | 16,879,059 | 30,810,173 |
Accelerated Share Repurchases, Settlement (Payment) or Receipt |  |  | $ 400.0 |
Accelerated Share Repurchases, Adjustment to Recorded Amount |  |  | $ 54.2 |
Accelerated Share Repurchases, Final Price Paid Per Share | $ / shares |  | $ 53.34 | $ 64.37 |
Percent of total shares expected to be delivered |  | 0.80 |  |
Treasury Stock, Shares, Acquired | shares | 965,284 | 4,659,290 |  |
2014 Mosaic Stock and Incentive Plan |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Number of shares and share options authorized under plan | shares |  | 25,000,000 |  |
Share Repurchase Program 2022 |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchase Program, Authorized Amount |  | $ 3,000.0 |  |
Stock Repurchased During Period, Value |  | 748.0 |  |
Share Repurchase Program 2021 |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchased During Period, Value |  |  | $ 1,700.0 |
Accelerated Share Repurchase Agreement |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchased and Retired During Period, Value |  | 300.0 |  |
Accelerated Share Repurchases, Settlement (Payment) or Receipt |  | $ 300.0 |  |
Accelerated Share Repurchases, Adjustment to Recorded Amount |  |  | $ 54.2 |
Stock Repurchased and Retired During Period, Shares | shares |  | 5,624,574 |  |
Treasury Stock, Shares, Acquired | shares |  |  | 7,056,229 |
Accelerated Share Repurchase Agreement 2023 |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Accelerated Share Repurchases, Settlement (Payment) or Receipt |  |  | $ 400.0 |
Treasury Stock, Shares, Acquired | shares |  | 5,624,574 |  |
Vale Fertilizantes S.A. |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Stock Repurchased During Period, Shares | shares |  |  | 7,056,229 |

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