v3.26.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Earnings Per Share [Abstract]        
Net income (loss) attributable to Mosaic $ (272.8) $ 410.7 $ (530.4) $ 648.8
Basic weighted average number of shares outstanding 317.9 317.3 317.7 317.1
Dilutive impact of share-based awards 0.0 1.7 0.0 1.4
Diluted weighted average number of shares outstanding 317.9 319.0 317.7 318.5
Basic net earnings (loss) per share attributable to Mosaic $ (0.86) $ 1.29 $ (1.67) $ 2.05
Diluted net earnings (loss) per share attributable to Mosaic $ (0.86) $ 1.29 $ (1.67) $ 2.04
Shares subject to issuance upon exercise of stock options excluded from the calculation of diluted earnings per share 2.9 0.0 2.2 0.2