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Segment Information - Other Financial Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Other financial information [Abstract]          
Total assets $ 21,903.8   $ 21,903.8   $ 20,671.8
Operating Segments [Member]          
Other financial information [Abstract]          
Total assets [1] 21,903.8 $ 20,189.6 21,903.8 $ 20,189.6  
Goodwill 45.2 45.2 45.2 45.2  
Capital expenditures 747.5 655.0 2,323.9 1,742.2  
Operating Segments [Member] | Gathering and Processing [Member]          
Other financial information [Abstract]          
Total assets [1] 13,201.9 12,405.7 13,201.9 12,405.7  
Goodwill 45.2 45.2 45.2 45.2  
Capital expenditures 485.3 421.5 1,359.2 1,081.7  
Operating Segments [Member] | Logistics and Transportation [Member]          
Other financial information [Abstract]          
Total assets [1] 8,525.3 7,568.0 8,525.3 7,568.0  
Capital expenditures 251.9 229.7 954.3 645.0  
Operating Segments [Member] | Other [Member]          
Other financial information [Abstract]          
Total assets [1] 1.5 7.8 1.5 7.8  
Operating Segments [Member] | Corporate and Eliminations [Member]          
Other financial information [Abstract]          
Total assets [1] 175.1 208.1 175.1 208.1  
Capital expenditures $ 10.3 $ 3.8 $ 10.4 $ 15.5  
[1] Assets in the Corporate and Eliminations column primarily include tax-related assets, cash, prepaids and debt issuance costs for our revolving credit facility.