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FRESH START ACCOUNTING - Property, Plant and Equipment (Details)
$ in Millions
Oct. 31, 2020
USD ($)
Fresh-Start Adjustment [Line Items]  
Total PP&E $ 2,682
Proved oil and natural gas properties  
Fresh-Start Adjustment [Line Items]  
Total PP&E 2,409
Facilities and other  
Fresh-Start Adjustment [Line Items]  
Total PP&E $ 273