v3.26.3
Commitments and Contingencies - Additional Information (Details)
 1 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Dec. 31, 2022
party
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Mar. 31, 2016
USD ($)
Jun. 30, 2026
USD ($)
mine
Aug. 27, 2025
employee
claim
Sep. 30, 2026
USD ($)
site
location
mine
defendant
plaintiff
alleged_former_employee
lawsuit
mi
Sep. 30, 2026
USD ($)
location
plaintiff
site
mine
lawsuit
alleged_former_employee
party
defendant
mi
Feb. 23, 2026
claim
Dec. 31, 2025
USD ($)
Oct. 31, 2025
entity
Aug. 31, 2025
mine
Jun. 04, 2024
claim
defendant
Nov. 30, 2022
site
facility
Oct. 18, 2021
Nov. 07, 2017
mine
Site Contingency                                
Number of sites subject to remediation (sites) | site             19 19                
Number of sites expected to cost less than 500K (sites) | site             9 9                
Expected future cost of remediation or investigation (less than)               $ 500,000                
Number of sites subsidiaries formally conducted business but no longer do | site             18 18                
Number of additional sites | site             1 1                
Site contingency, estimated life             5 years 5 years                
Environmental loss accrual             $ 61,500,000 $ 61,500,000   $ 42,200,000            
Environmental             $ 6,100,000 $ 6,100,000                
Site contingency, number of operating units | location             2 2                
Loss contingency, number of potentially responsible parties | party 80                              
Loss accrual             $ 11,400,000 $ 11,400,000                
Lower Passaic River Study Area                                
Site Contingency                                
Portion of site subject to remediation (miles) | mi             8.3 8.3                
Number of other potentially responsible parties | party               120                
Lower Passaic River Study Area | Minimum                                
Site Contingency                                
Site contingency, loss exposure in excess of accrual best estimate       $ 1,380,000,000                        
Upper Nine Miles of the River                                
Site Contingency                                
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 $ 700,000                
Loss contingency, number of potentially responsible parties | party               2                
Settlement payment   $ 5,900,000                            
Lower Passaic River Study Area, OU4, Recovery Of Costs                                
Site Contingency                                
Site contingency, loss exposure not accrued, best estimate               $ 165,000,000                
Arizona Uranium Mines                                
Site Contingency                                
Environmental loss accrual             $ 36,200,000 $ 36,200,000                
Investigative sites notice from EPA | mine             8 8               8
Number of priority mines | mine         2   2 2       2        
Number of non priority mines | mine             6 6                
Accrual for environmental loss contingencies, period increase (decrease)         $ 25,200,000                      
Percentage of expenses reimbursable by the U.S.                             35.00%  
Expected future contributions toward remediation of mines             $ 12,600,000 $ 12,600,000                
Thorofare, New Jersey                                
Site Contingency                                
Number of facilities (facilities) | facility                           2    
Number of sites, active operations (sites) | site                           1    
GGB (ISRA) Investigation and Cleanup                                
Site Contingency                                
Environmental loss accrual             2,600,000 2,600,000                
Water Valley, Mississippi                                
Site Contingency                                
Environmental loss accrual             $ 6,000,000.0 $ 6,000,000.0                
Number of pending claims           8 690 690 8       8      
Loss contingency, number of defendants named in litigation | defendant             2 2         2      
Loss contingency new claims filed number | lawsuit             22                  
Loss contingency, number of plaintiffs | plaintiff               184                
Loss contingency, new claims filed, number not named as defendants | lawsuit               14                
Loss contingency, number of plaintiffs, not named as defendant | plaintiff             506 506                
Loss contingency, number of defendants named in litigation, individual consultant | defendant             2 2                
Loss contingency, number of defendants named in litigation, consulting and construction firms | defendant             6 6                
Loss contingency, number of claims, named as defendant | lawsuit             8 8                
Number of total plaintiffs | employee           150                    
Number of sites subject to remediation, addition (sites) | site             5 5                
Water Valley, Mississippi | Mississippi State Court Proceedings                                
Site Contingency                                
Loss contingency, new claims filed, number not named as defendants | lawsuit               17                
Water Valley, Mississippi | Mississippi State Court Proceedings, Enpro, BorgWarner, And Solero Technologies                                
Site Contingency                                
Loss contingency, number of claims, named as defendant | lawsuit             3 3                
Water Valley Facility                                
Site Contingency                                
Loss contingency, number of plaintiffs | plaintiff               639                
Pine Bluff                                
Site Contingency                                
Environmental loss accrual             $ 4,700,000 $ 4,700,000                
Occidental Chemical Corporation | Lower Passaic River Study Area                                
Site Contingency                                
Site contingency number of entities | entity                     2          
Related Party | Crucible Steel Corporation                                
Site Contingency                                
Portion of site subject to remediation (miles) | mi             17 17