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Segment Information - Other Financial Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Other financial information [Abstract]          
Total assets $ 21,264.2   $ 21,264.2   $ 20,671.8
Operating Segments [Member]          
Other financial information [Abstract]          
Total assets [1] 21,264.2 $ 19,461.8 21,264.2 $ 19,461.8  
Goodwill 45.2 45.2 45.2 45.2  
Capital expenditures 846.7 632.9 1,576.4 1,087.2  
Operating Segments [Member] | Gathering and Processing [Member]          
Other financial information [Abstract]          
Total assets [1] 12,956.0 12,316.5 12,956.0 12,316.5  
Goodwill 45.2 45.2 45.2 45.2  
Capital expenditures 438.9 390.7 873.9 660.2  
Operating Segments [Member] | Logistics and Transportation [Member]          
Other financial information [Abstract]          
Total assets [1] 8,117.7 6,890.4 8,117.7 6,890.4  
Capital expenditures 408.8 238.7 702.4 415.3  
Operating Segments [Member] | Other [Member]          
Other financial information [Abstract]          
Total assets [1] 0.5 13.4 0.5 13.4  
Operating Segments [Member] | Corporate and Eliminations [Member]          
Other financial information [Abstract]          
Total assets [1] 190.0 241.5 190.0 241.5  
Capital expenditures $ (1.0) $ 3.5 $ 0.1 $ 11.7  
[1] Assets in the Corporate and Eliminations column primarily include tax-related assets, cash, prepaids and debt issuance costs for our revolving credit facility.