XML 50 R36.htm IDEA: XBRL DOCUMENT v3.8.0.1
Environmental Liabilities and Expenditures (Details)
$ in Millions
1 Months Ended 3 Months Ended
Mar. 31, 2016
mi
Mar. 31, 2018
USD ($)
category
site
Sep. 30, 2016
USD ($)
Dec. 31, 2017
USD ($)
Environmental remediation reserves        
Number of Sites | site   149    
Environmental remediation reserves, current, included in accrued liabilities   $ 136    
Environmental remediation reserves, noncurrent, included in deferred credits and other liabilities - other   $ 729   $ 728
Number of non-NPL sites categories | category   3    
Reserve Balance   $ 865    
Environmental reserves, exceeding $ ten million, threshold value   $ 10    
Environmental reserves, exceeding $ ten million, number of sites | site   15    
Environmental reserves, range between zero to $ one million site category, number of sites | site   88    
Expected expend funds of environmental reserves (as a percent)   40.00%    
Minimum period of expending second half of environmental reserves   10 years    
Environmental remediation additional loss range   $ 1,100    
Low end of range        
Environmental remediation reserves        
Period of expending first half of environmental reserves   3 years    
High end of range        
Environmental remediation reserves        
Environmental reserves, range between zero to $ one million site category   $ 1    
Period of expending first half of environmental reserves   4 years    
Lower Passaic River        
Environmental remediation reserves        
Stretch of Lower Passaic river requiring remedial actions | mi 8.3      
Stretch of Lower Passaic river not covered by remedial actions | mi 9      
Clean-up estimated cost     $ 165  
NPL sites        
Environmental remediation reserves        
Number of Sites | site   34    
Reserve Balance   $ 460    
Third-party sites        
Environmental remediation reserves        
Number of Sites | site   71    
Reserve Balance   $ 159    
Occidental-operated sites        
Environmental remediation reserves        
Number of Sites | site   15    
Reserve Balance   $ 107    
Closed or non-operated Occidental sites        
Environmental remediation reserves        
Number of Sites | site   29    
Reserve Balance   $ 139