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REDEMABLE NONCONTROLLING INTEREST - ALTUS - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 12, 2019
Jun. 30, 2020
Jun. 30, 2019
Class of Stock [Line Items]      
Redeemable noncontrolling interest - Altus Preferred Unit limited partners   $ 0 $ 611
Altus Midstream LP      
Class of Stock [Line Items]      
Embedded derivative $ 94 $ 175  
Altus Midstream LP | Altus Preferred Unit limited partners      
Class of Stock [Line Items]      
Aggregate issue price of Preferred Units 625    
Redeemable noncontrolling interest - Altus Preferred Unit limited partners 611    
Issue discount 4    
Transaction costs 10    
Embedded derivative $ 94