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RECAPITALIZATION TRANSACTION - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Nov. 09, 2018
Mar. 31, 2019
Noncontrolling Interest [Line Items]    
Capital contributed $ 628.2  
Altus Midstream LP    
Noncontrolling Interest [Line Items]    
General partner, ownership interest   23.10%
Apache | Altus Midstream LP    
Noncontrolling Interest [Line Items]    
Limited partners, ownership interest 76.90% 76.90%
Class C Common Stock | Apache    
Noncontrolling Interest [Line Items]    
Common stock, ownership percentage   100.00%
Class A Common Stock    
Noncontrolling Interest [Line Items]    
Common stock, redemption ratio   1
Class A Common Stock | Apache    
Noncontrolling Interest [Line Items]    
Common stock, ownership percentage   9.80%