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Commitments and Contingencies - Additional Information (Details)
 1 Months Ended 9 Months Ended
Apr. 14, 2021
USD ($)
mi
Jun. 30, 2018
party
Mar. 03, 2016
USD ($)
Apr. 11, 2014
USD ($)
mi
Sep. 30, 2022
USD ($)
Oct. 31, 2016
USD ($)
Sep. 30, 2023
USD ($)
site
party
mine
mi
Dec. 31, 2022
USD ($)
Oct. 18, 2021
Apr. 30, 2015
USD ($)
Site Contingency                    
Number of sites subject to remediation (sites) | site             18      
Number of sites, cost in excess of 100K (sites) | site             12      
Cost per site minimis threshold             $ 100,000      
Number of sites, investigation completed (sites) | site             15      
Number of sites investigation in progress (sites) | site             3      
Site contingency, number of sites subject to remediation activities, contains remediation systems | site             7      
Site contingency, number of sites subject to remediation activities, monitored | site             8      
Number of sites, active operations (sites) | site             1      
Environmental loss accrual             $ 39,200,000 $ 42,100,000    
Environmental             12,000,000.0 $ 10,400,000    
Loss accrual             $ 26,700,000      
Lower Passaic River                    
Site Contingency                    
Portion of site subject to remediation (miles) | mi       8            
Number of other potentially responsible parties | party   120         70      
Estimate of cost                   $ 726,000,000
Estimate low end           $ 165,000,000        
Estimated development time (in years)           4 years        
Upper Nine Miles of the River                    
Site Contingency                    
Portion of site subject to remediation (miles) | mi 9                  
Site contingency, loss exposure in excess of accrual best estimate $ 441,000,000                  
Lower Eight Miles of River                    
Site Contingency                    
Environmental loss accrual             $ 700,000      
Settlement payment         $ 5,900,000          
Arizona Uranium Mines                    
Site Contingency                    
Environmental loss accrual             $ 11,900,000      
Investigative sites notice from EPA | mine             8      
Percentage of expenses reimbursable by the U.S. (as a percent)                 35.00%  
Future contributions from U.S.             $ 3,000,000      
Water Valley, Mississippi                    
Site Contingency                    
Loss accrual             $ 13,700,000      
Minimum | Lower Passaic River                    
Site Contingency                    
Site contingency, loss exposure in excess of accrual best estimate     $ 1,380,000,000 $ 953,000,000            
Maximum | Lower Passaic River                    
Site Contingency                    
Site contingency, loss exposure in excess of accrual best estimate     $ 1,730,000,000              
Related Party | Crucible Steel Corporation                    
Site Contingency                    
Number of sites subject to remediation (sites) | site             18      
Portion of site subject to remediation (miles) | mi             17