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Investment in Unconsolidated Affiliates (Details)
$ in Millions
3 Months Ended 6 Months Ended
May 16, 2022
Bcf / d
mi
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2022
USD ($)
Bcf / d
mi
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Equity method investments            
Amount of processing capacity | Bcf / d 2.5     5.5    
Number of miles of pipeline | mi 490     12,100    
Contributions   $ 26.6 $ 0.0 $ 26.6 $ 0.0  
Distributions   (0.2) (0.1) (0.4) (3.7)  
Loss from unconsolidated affiliate investments   (1.2) (1.3) (2.3) (7.6)  
Total investment in unconsolidated affiliates   $ 53.0   $ 53.0   $ 28.0
GCF            
Equity method investments            
Ownership interest   38.75%   38.75%    
Contributions   $ 0.5 0.0 $ 0.5 0.0  
Distributions   0.0 0.0 0.0 (3.5)  
Loss from unconsolidated affiliate investments   $ (0.9) (0.7) $ (1.6) (6.4)  
Cedar Cove JV            
Equity method investments            
Ownership interest   30.00%   30.00%    
Distributions   $ (0.2) (0.1) $ (0.4) (0.2)  
Loss from unconsolidated affiliate investments   $ (0.3) (0.6) $ (0.7) (1.2)  
Matterhorn JV            
Equity method investments            
Ownership interest   15.00%   15.00%    
Contributions   $ 26.1 $ 0.0 $ 26.1 $ 0.0  
EnLink Midstream Partners, LP            
Equity method investments            
Total investment in unconsolidated affiliates   50.1   50.1   26.2
EnLink Midstream Partners, LP | GCF            
Equity method investments            
Total investment in unconsolidated affiliates   26.9   26.9   28.0
EnLink Midstream Partners, LP | Cedar Cove JV            
Equity method investments            
Total investment in unconsolidated affiliates   (2.9)   (2.9)   (1.8)
EnLink Midstream Partners, LP | Matterhorn JV            
Equity method investments            
Total investment in unconsolidated affiliates   $ 26.1   $ 26.1   $ 0.0