v3.26.1
Fair Value Measurements (Details) - EBP 004 [Member] - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 912,255,486 $ 826,981,107
Total    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 1,211,953,003 1,108,954,708
Total | Mosaic Company common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 13,661,386 14,786,436
Total | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 90,608,478 94,246,522
Total | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 1,100,476,410 979,257,298
Total | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 7,206,729  
Total | Interest bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   20,664,452
Level 1    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 111,476,593 129,697,410
Level 1 | Mosaic Company common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 13,661,386 14,786,436
Level 1 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 90,608,478  
Level 1 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 1 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 7,206,729  
Level 1 | Interest bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   20,664,452
Level 2    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 1,100,476,410 979,257,298
Level 2 | Mosaic Company common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 2 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 1,100,476,410 979,257,298
Level 2 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0  
Level 2 | Interest bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   0
Level 3    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Mosaic Company common stock    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Mutual funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Common/collective trust funds    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value 0 0
Level 3 | Money market fund    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value $ 0  
Level 3 | Interest bearing cash    
EBP, Investment, Fair Value and NAV [Line Items]    
Total investments at fair value   $ 0