v3.26.1
Inventories (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Inventory, Net [Abstract]        
Separative work units valuation change in period $ 0.0 $ 1.5 $ (0.6) $ 3.6
Separative work units repaid in period, value $ 2.5 $ (12.3) $ 38.3 (38.8)
UF6 repaid in period, value       $ 29.8