v3.26.1
Inventories (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Inventory Disclosure [Abstract]    
Raw materials $ 309.5 $ 285.7
Work in process 1,134.0 1,150.2
Finished goods 1,727.7 1,587.6
Final price deferred [1] 32.1 133.8
Operating materials and supplies 219.6 205.7
Total Inventory $ 3,422.9 $ 3,363.0
[1] Final price deferred is product that has shipped to customers, but the price has not yet been agreed upon.