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Revenues (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Disaggregation of Revenue [Line Items]        
Revenues $ 1,448.0 $ 929.6 $ 3,031.8 $ 1,962.3
Natural Gas Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 57.4 33.3 105.7 64.7
Crude Oil Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 16.0 18.4 31.8 39.1
Water Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 44.5 22.7 81.4 44.7
Natural Gas Processing        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 20.9 7.3 36.4 14.3
Natural Gas Compression        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3.1 3.7 6.6 8.4
Crude Oil Storage        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.8 0.1 1.2 0.3
NGL Storage        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.9 2.4 4.7 6.1
Crude Oil Pipeline        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.4 0.6 0.9 1.4
Crude Oil Transportation        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.7 0.4 3.0 1.1
NGL Transportation        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 5.5 4.2 11.3 8.4
Crude Oil Rail Loading        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   1.2 0.4 2.2
Natural Gas Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 183.6 44.3 294.4 140.5
Crude Oil Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 526.5 431.4 1,017.4 749.9
NGL Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 473.7 305.1 1,119.3 711.1
Other revenue        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.4 0.7 0.9 0.9
Water Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.3   2.9  
NGL Pipeline        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.1 0.1 0.1 0.1
NGL Pipeline | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.0    
NGL Pipeline | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.0    
NGL Pipeline | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.1    
Intersegment Eliminations        
Disaggregation of Revenue [Line Items]        
Revenues (151.6) (84.2) (279.0) (189.5)
Intersegment Eliminations | Natural Gas Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Crude Oil Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Water Gathering        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Natural Gas Processing        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Natural Gas Compression        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Crude Oil Storage        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (0.1) (0.1) (0.2) (0.2)
Intersegment Eliminations | NGL Storage        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Crude Oil Pipeline        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Crude Oil Transportation        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (0.1) 0.0 (0.1) 0.0
Intersegment Eliminations | NGL Transportation        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Crude Oil Rail Loading        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.0 0.0 0.0
Intersegment Eliminations | Natural Gas Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (73.5) (26.8) (125.6) (69.0)
Intersegment Eliminations | Crude Oil Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (12.9) (14.7) (24.1) (37.4)
Intersegment Eliminations | NGL Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (65.0) (42.6) (129.0) (82.9)
Intersegment Eliminations | Other revenue        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Intersegment Eliminations | Water Product Sales        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0   0.0  
Intersegment Eliminations | NGL Pipeline        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenues 431.0 232.8 793.6 467.9
Operating Segments | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenues 35.3 24.7 66.0 49.3
Operating Segments | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenues 1,133.3 756.3 2,451.2 1,634.6
Operating Segments | Natural Gas Gathering | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 32.9 13.6 58.8 26.8
Operating Segments | Natural Gas Gathering | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 24.5 19.7 46.9 37.9
Operating Segments | Natural Gas Gathering | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Gathering | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 14.1 18.4 28.9 39.1
Operating Segments | Crude Oil Gathering | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.9 0.0 2.9 0.0
Operating Segments | Crude Oil Gathering | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Water Gathering | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 41.2 22.7 75.9 44.7
Operating Segments | Water Gathering | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3.3 0.0 5.5 0.0
Operating Segments | Water Gathering | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Natural Gas Processing | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 19.7 6.1 34.1 11.9
Operating Segments | Natural Gas Processing | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.2 1.2 2.3 2.4
Operating Segments | Natural Gas Processing | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Natural Gas Compression | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Natural Gas Compression | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 3.1 3.7 6.6 8.4
Operating Segments | Natural Gas Compression | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Storage | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.6 0.1 1.1 0.2
Operating Segments | Crude Oil Storage | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Storage | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.3 0.1 0.3 0.3
Operating Segments | NGL Storage | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Storage | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Storage | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.9 2.4 4.7 6.1
Operating Segments | Crude Oil Pipeline | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Pipeline | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Pipeline | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.4 0.6 0.9 1.4
Operating Segments | Crude Oil Transportation | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.5 0.4 2.7 1.1
Operating Segments | Crude Oil Transportation | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.3 0.0 0.4 0.0
Operating Segments | Crude Oil Transportation | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Transportation | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Transportation | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Transportation | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 5.5 4.2 11.3 8.4
Operating Segments | Crude Oil Rail Loading | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.0 0.0 0.0
Operating Segments | Crude Oil Rail Loading | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   0.0 0.0 0.0
Operating Segments | Crude Oil Rail Loading | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax   1.2 0.4 2.2
Operating Segments | Natural Gas Product Sales | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 95.6 26.7 159.5 69.0
Operating Segments | Natural Gas Product Sales | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.6 0.1 0.9 0.6
Operating Segments | Natural Gas Product Sales | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 160.9 44.3 259.6 139.9
Operating Segments | Crude Oil Product Sales | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 145.9 101.7 274.0 191.7
Operating Segments | Crude Oil Product Sales | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Crude Oil Product Sales | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 393.5 344.4 767.5 595.6
Operating Segments | NGL Product Sales | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 77.5 42.9 154.4 83.2
Operating Segments | NGL Product Sales | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | NGL Product Sales | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 461.2 304.8 1,093.9 710.8
Operating Segments | Other revenue | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.4 0.0 0.6 0.0
Operating Segments | Other revenue | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.0 0.0 0.0
Operating Segments | Other revenue | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0 0.7 0.3 0.9
Operating Segments | Water Product Sales | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1.3   2.9  
Operating Segments | Water Product Sales | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0   0.0  
Operating Segments | Water Product Sales | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0   0.0  
Operating Segments | NGL Pipeline | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0   0.0 0.0
Operating Segments | NGL Pipeline | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.0   0.0 0.0
Operating Segments | NGL Pipeline | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 0.1   0.1 0.1
Revenue from Contract with Customer        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,337.8 875.9 2,718.4 1,793.2
Revenue from Contract with Customer | Intersegment Eliminations        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax (151.6) (84.2) (279.0) (189.5)
Revenue from Contract with Customer | Operating Segments | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 430.7 232.6 792.9 467.7
Revenue from Contract with Customer | Operating Segments | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 34.9 24.7 65.5 49.3
Revenue from Contract with Customer | Operating Segments | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Revenue from Contract with Customer, Excluding Assessed Tax 1,023.8 702.8 2,139.0 1,465.7
Product and Service, Other        
Disaggregation of Revenue [Line Items]        
Non-Topic 606 revenues 110.2 53.7 313.4 169.1
Product and Service, Other | Intersegment Eliminations        
Disaggregation of Revenue [Line Items]        
Non-Topic 606 revenues 0.0 0.0 0.0 0.0
Product and Service, Other | Operating Segments | Gathering and Processing North        
Disaggregation of Revenue [Line Items]        
Non-Topic 606 revenues 0.3 0.2 0.7 0.2
Product and Service, Other | Operating Segments | Gathering and Processing South        
Disaggregation of Revenue [Line Items]        
Non-Topic 606 revenues 0.4 0.0 0.5 0.0
Product and Service, Other | Operating Segments | Storage and Logistics        
Disaggregation of Revenue [Line Items]        
Non-Topic 606 revenues $ 109.5 $ 53.5 $ 312.2 $ 168.9