v3.26.1
Segment Information - Revenues and Operating Margin (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Revenues:        
Revenues $ 4,440.1 $ 4,260.1 $ 8,534.8 $ 8,821.6
Sales of Commodities [Member]        
Revenues:        
Revenues 3,592.9 3,636.3 6,937.5 7,520.7
Fees from Midstream Services [Member]        
Revenues:        
Revenues 847.2 623.8 1,597.3 1,300.9
Gathering and Processing [Member]        
Revenues:        
Operating expenses 240.9 219.4 474.5 427.6
Other segment items [1] 336.8 938.7 1,177.2 2,321.3
Operating margin 732.6 587.6 1,436.1 1,189.8
Logistics and Transportation [Member]        
Revenues:        
Operating expenses 114.3 105.4 214.5 200.9
Other segment items [1] 2,433.4 2,684.6 4,971.1 6,143.4
Operating margin 948.3 632.4 1,721.6 1,279.1
Other [Member]        
Revenues:        
Revenues 103.1 280.5 (7.2) 31.7
Operating margin 103.1 280.5 (7.2) 31.7
Other [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues     (7.2)  
Corporate and Eliminations [Member]        
Revenues:        
Revenues (469.3) (1,188.5) (1,453.0) (2,772.2)
Operating Segments [Member]        
Revenues:        
Revenues 4,337.0 3,979.6 8,542.0 8,789.9
Operating expenses 355.2 324.8 689.0 628.5
Other segment items [1] 2,770.2 3,623.3 6,148.3 8,464.7
Operating margin 1,680.9 1,220.0 3,157.7 2,468.9
Operating Segments [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 3,489.8 3,355.8 6,944.7 7,489.0
Operating Segments [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues 847.2 623.8 1,597.3 1,300.9
Operating Segments [Member] | Gathering and Processing [Member]        
Revenues:        
Revenues 876.7 613.9 1,736.8 1,289.7
Operating Segments [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 310.8 203.3 596.4 404.0
Operating Segments [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues 565.9 410.6 1,140.4 885.7
Operating Segments [Member] | Logistics and Transportation [Member]        
Revenues:        
Revenues 3,460.3 3,365.7 6,805.2 7,500.2
Operating Segments [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 3,179.0 3,152.5 6,348.3 7,085.0
Operating Segments [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues 281.3 213.2 456.9 415.2
Operating Segments [Member] | Other [Member]        
Revenues:        
Revenues 103.1 280.5 (7.2) 31.7
Operating Segments [Member] | Other [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 103.1 280.5   31.7
Intersegment Eliminations [Member]        
Revenues:        
Revenues 469.3 1,188.5 1,453.0 2,772.2
Intersegment Eliminations [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 459.0 1,180.7 1,434.4 2,757.1
Intersegment Eliminations [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues 10.3 7.8 18.6 15.1
Intersegment Eliminations [Member] | Gathering and Processing [Member]        
Revenues:        
Revenues 433.6 1,131.8 1,351.0 2,649.0
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 433.6 1,131.5 1,351.9 2,648.5
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues   0.3 (0.9) 0.5
Intersegment Eliminations [Member] | Logistics and Transportation [Member]        
Revenues:        
Revenues 35.7 56.7 102.0 123.2
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues 25.4 49.2 82.5 108.6
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues 10.3 7.5 19.5 14.6
Intersegment Eliminations [Member] | Corporate and Eliminations [Member]        
Revenues:        
Revenues (469.3) (1,188.5) (1,453.0) (2,772.2)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Sales of Commodities [Member]        
Revenues:        
Revenues (459.0) (1,180.7) (1,434.4) (2,757.1)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Fees from Midstream Services [Member]        
Revenues:        
Revenues (10.3) (7.8) (18.6) (15.1)
Consolidated Revenue [Member]        
Revenues:        
Revenues 4,806.3 5,168.1 9,995.0 11,562.1
Consolidated Revenue [Member] | Gathering and Processing [Member]        
Revenues:        
Revenues 1,310.3 1,745.7 3,087.8 3,938.7
Consolidated Revenue [Member] | Logistics and Transportation [Member]        
Revenues:        
Revenues $ 3,496.0 $ 3,422.4 $ 6,907.2 $ 7,623.4
[1] “Other segment items” represents Product purchases and fuel.