v3.26.1
COMMITMENTS AND CONTINGENCIES - Narrative (Details)
 1 Months Ended 3 Months Ended
Mar. 31, 2023
defendant
Jul. 31, 2018
defendant
Mar. 31, 2016
mi
May 31, 2007
entity
mi
Mar. 31, 2026
USD ($)
case
facility
Dec. 31, 2025
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Loss Contingencies [Line Items]                
Lease liabilities         $ 581,300,000 $ 577,900,000 $ 624,900,000  
Reclamation/restoration requirements         460,000,000.0 $ 456,500,000 $ 429,500,000 $ 427,400,000
Contingency loss         0      
Hewitt Landfill Matter | NHW Treatment System                
Loss Contingencies [Line Items]                
Estimated capital cost of treatment system         92,000,000      
Hewitt Landfill Matter | NHC Treatment System                
Loss Contingencies [Line Items]                
Estimated capital cost of treatment system         245,000,000      
Hewitt Landfill Matter | LADWP                
Loss Contingencies [Line Items]                
LADWP Groundwater System Improvement Study, cost         11,500,000      
LADWP Groundwater system additional costs         $ 22,000,000      
Cases Allegedly Involving 1,1,1-Trichloroethane                
Loss Contingencies [Line Items]                
Number of cases | case         1      
Cooperating Parties Group                
Loss Contingencies [Line Items]                
Number of other companies to perform Remedial Investigation/Feasibility Study | entity       70        
Number of miles of the River used in the Remedial Investigation/Feasibility Study | mi       17        
Number of miles for bank-to-bank dredging remedy | mi     8          
EPA | Maximum                
Loss Contingencies [Line Items]                
Estimated implementation costs         $ 1,380,000,000      
Occidental Chemical Co | Lawsuit Filed by Occidental                
Loss Contingencies [Line Items]                
Number of defendants | defendant 39 100            
LADWP                
Loss Contingencies [Line Items]                
Number of planned new treatment capabilities | facility         2      
Standby Letters of Credit                
Loss Contingencies [Line Items]                
Letters of credit outstanding, amount         $ 24,200,000      
Reclamation/restoration requirements         $ 14,400,000