v3.26.3
Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Inventory Disclosure [Abstract]    
Raw materials $ 261.2 $ 285.7
Work in process 1,247.0 1,150.2
Finished goods 1,503.6 1,587.6
Final price deferred [1] 7.2 133.8
Operating materials and supplies 205.0 205.7
Total Inventory $ 3,224.0 $ 3,363.0
[1] Final price deferred is product that has shipped to customers, but the price has not yet been agreed upon.