v3.26.1
Commitments and Contingencies - Additional Information (Details)
 1 Months Ended 2 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2016
USD ($)
Dec. 31, 2022
party
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
May 04, 2026
plaintiff
defendant
alleged_former_employee
lawsuit
Mar. 31, 2026
USD ($)
Aug. 27, 2025
claim
employee
Jun. 30, 2026
USD ($)
site
location
mine
party
mi
Dec. 31, 2025
USD ($)
Jun. 04, 2024
claim
Nov. 30, 2022
facility
site
Oct. 18, 2021
Site Contingency                        
Number of sites subject to remediation (sites) | site               19        
Number of sites expected to cost less than 500K (sites) | site               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        
Environmental loss accrual               $ 64,400,000 $ 42,200,000      
Environmental               $ 7,700,000        
Site contingency, number of operating units | location               2        
Loss contingency, number of potentially responsible parties | party   80                    
Loss accrual               $ 11,600,000        
Lower Passaic River Study Area                        
Site Contingency                        
Portion of site subject to remediation (miles) | mi               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        
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           $ 11,300,000   $ 36,400,000        
Investigative sites notice from EPA | mine               8        
Number of priority mines | mine               2        
Number of non priority mines | mine               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               12,700,000        
Increase in expected future contributions toward remediation of mines           $ 9,200,000            
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               2,700,000        
Water Valley, Mississippi                        
Site Contingency                        
Environmental loss accrual               $ 7,100,000        
Number of pending claims         635   8     8    
Loss contingency new claims filed number | lawsuit         17              
Loss contingency, number of plaintiffs | plaintiff         154              
Loss contingency, new claims filed, number not named as defendants | lawsuit         12              
Loss contingency, number of plaintiffs, not named as defendant | plaintiff         481              
Loss contingency, number of defendants named in litigation | defendant         2              
Loss contingency, number of defendants named in litigation, individual consultant | defendant         2              
Loss contingency, number of defendants named in litigation, consulting and construction firms | defendant         6              
Loss contingency, number of claims, named as defendant | lawsuit         5              
Number of total plaintiffs | employee             150          
Number of sites subject to remediation, addition (sites) | site               5        
Water Valley Facility                        
Site Contingency                        
Loss contingency, number of plaintiffs | plaintiff         609              
Pine Bluff                        
Site Contingency                        
Environmental loss accrual               $ 5,900,000        
Related Party | Crucible Steel Corporation                        
Site Contingency                        
Portion of site subject to remediation (miles) | mi               17