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THE SPIN-OFF, SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND OTHER (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 01, 2014
Nov. 30, 2014
Basis of Presentation        
Total Debt - Principal Amount $ 6,143 $ 6,360    
Pre-tax interest expense $ 326 72    
Pro-forma basis        
Interest expense   $ 314    
Spinoff - CRC | Occidental Petroleum And Subsidiaries        
Separation and Spin Off Transactions        
Percentage of outstanding shares of common stock retained by Occidental     18.50% 18.50%