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CAPITAL STOCK AND EQUITY - Performance Program Narrative (Details)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2022
$ / shares
shares
Jan. 31, 2021
shares
Jan. 31, 2020
shares
Jan. 31, 2019
shares
Jan. 31, 2018
shares
Jan. 31, 2017
shares
Jun. 30, 2021
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares authorized and available for grant (in shares)               11,000,000    
Compensation expense | $               $ 152 $ 40 $ 110
Stock-settled and cash-settled compensation capitalized | $               $ 18 $ 7 $ 28
Altus Midstream LP                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Reverse stock split ratio             0.05      
Phantom Units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)               4,441,000 3,462,000 4,831,000
Phantom Units | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares) 2,512,602                  
Performance Program                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares allocation percentage               50.00%    
Shares vesting period               3 years    
Compensation expense | $               $ 56 $ 8 $ 24
Stock-settled and cash-settled compensation capitalized | $               $ 3 $ 1 $ 3
Performance Program | Vesting, Tranche One                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares vesting percentage               50.00%    
Performance Program | Vesting, Tranche Two                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares vesting percentage               50.00%    
2017 Performance Program | Conditional Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)           620,885        
Total awards, outstanding (in shares)               1,868    
Shares paid out as percentage of target               54.00%    
2018 Performance Program | Phantom Units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)         931,049          
Total awards, outstanding (in shares)               97,645    
Shares paid out as percentage of target               23.00%    
2019 Performance Program | Phantom Units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)       1,679,832            
Total awards, outstanding (in shares)               1,247,706    
Shares paid out as percentage of target               100.00%    
2020 Performance Program | Phantom Units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)     1,687,307              
Total awards, outstanding (in shares)               1,330,823    
2020 Performance Program | Phantom Units | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares awarded of target     0.00%              
Shares authorized and available for grant (in shares)     0              
2020 Performance Program | Phantom Units | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares awarded of target     200.00%              
Shares authorized and available for grant (in shares)     2,661,646              
2021 Performance Program | Phantom Units                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares)   1,959,856                
Total awards, outstanding (in shares)               1,854,736    
2021 Performance Program | Phantom Units | Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares awarded of target   0.00%                
Shares authorized and available for grant (in shares)   0                
2021 Performance Program | Phantom Units | Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Percentage of shares awarded of target   20000.00%                
Shares authorized and available for grant (in shares)   3,709,472                
2022 Performance Program | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares allocation percentage 50.00%                  
Shares vesting period 3 years                  
Shares vesting percentage 50.00%                  
2022 Performance Program | Phantom Units | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Awards granted during period (in shares) 1,093,034                  
2022 Performance Program | Phantom Units | Subsequent Event | Vesting, Tranche One                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Weighted average grant date fair value per share (in USD per share) | $ / shares $ 41.88                  
2022 Performance Program | Phantom Units | Subsequent Event | Vesting, Tranche Two                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Weighted average grant date fair value per share (in USD per share) | $ / shares $ 29.46                  
2022 Performance Program | Phantom Units | Minimum | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares authorized and available for grant (in shares) 0                  
2022 Performance Program | Phantom Units | Maximum | Subsequent Event                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares authorized and available for grant (in shares) 2,186,068