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REVENUE RECOGNITION (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Schedule of disaggregated revenue
The following table provides disaggregated revenue from contracts with customers:
SuccessorPredecessor
November 1, 2020 - December 31, 2020January 1, 2020 - October 31, 2020Years ended December 31,
(in millions)20192018
Oil and natural gas sales
Oil$176 $874 $1,884 $2,110 
NGLs29 106 179 260 
Natural gas32 112 207 220 
237 1,092 2,270 2,590 
Electricity sales15 86 112 111 
Trading revenue38 124 286 330 
Other revenue14 25 32 
56 224 423 473 
Net derivative (loss) gain from commodity contracts(141)91 (59)
Total revenues$152 $1,407 $2,634 $3,064