v3.26.1
Segment Information - Revenues and Operating Margin (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues:    
Revenues $ 4,094.7 $ 4,561.5
Sales of Commodities [Member]    
Revenues:    
Revenues 3,344.6 3,884.4
Fees from Midstream Services [Member]    
Revenues:    
Revenues 750.1 677.1
Gathering and Processing [Member]    
Revenues:    
Operating expenses 233.6 208.2
Other segment items [1] 840.4 1,382.6
Operating margin 703.5 602.2
Logistics and Transportation [Member]    
Revenues:    
Operating expenses 100.2 95.5
Other segment items [1] 2,537.7 3,458.8
Operating margin 773.3 646.7
Other [Member]    
Revenues:    
Revenues (110.3) (248.8)
Operating margin (110.3) (248.8)
Other [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues (110.3)  
Corporate and Eliminations [Member]    
Revenues:    
Revenues (983.7) (1,583.7)
Operating Segments [Member]    
Revenues:    
Revenues 4,205.0 4,810.3
Operating expenses 333.8 303.7
Other segment items [1] 3,378.1 4,841.4
Operating margin 1,476.8 1,248.9
Operating Segments [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 3,454.9 4,133.2
Operating Segments [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 750.1 677.1
Operating Segments [Member] | Gathering and Processing [Member]    
Revenues:    
Revenues 860.1 675.8
Operating Segments [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 285.6 200.7
Operating Segments [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 574.5 475.1
Operating Segments [Member] | Logistics and Transportation [Member]    
Revenues:    
Revenues 3,344.9 4,134.5
Operating Segments [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 3,169.3 3,932.5
Operating Segments [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 175.6 202.0
Operating Segments [Member] | Other [Member]    
Revenues:    
Revenues (110.3) (248.8)
Operating Segments [Member] | Other [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues   (248.8)
Operating Segments [Member] | Corporate and Eliminations [Member]    
Revenues:    
Revenues 0.0  
Operating Segments [Member] | Corporate and Eliminations [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues (0.0)  
Operating Segments [Member] | Corporate and Eliminations [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 0.0  
Intersegment Eliminations [Member]    
Revenues:    
Revenues 983.7 1,583.7
Intersegment Eliminations [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 975.4 1,576.4
Intersegment Eliminations [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 8.3 7.3
Intersegment Eliminations [Member] | Gathering and Processing [Member]    
Revenues:    
Revenues 917.4 1,517.2
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 918.3 1,517.0
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues (0.9) 0.2
Intersegment Eliminations [Member] | Logistics and Transportation [Member]    
Revenues:    
Revenues 66.3 66.5
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues 57.1 59.4
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues 9.2 7.1
Intersegment Eliminations [Member] | Corporate and Eliminations [Member]    
Revenues:    
Revenues (983.7) (1,583.7)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Sales of Commodities [Member]    
Revenues:    
Revenues (975.4) (1,576.4)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Fees from Midstream Services [Member]    
Revenues:    
Revenues (8.3) (7.3)
Consolidated Revenue [Member]    
Revenues:    
Revenues 5,188.7 6,394.0
Consolidated Revenue [Member] | Gathering and Processing [Member]    
Revenues:    
Revenues 1,777.5 2,193.0
Consolidated Revenue [Member] | Logistics and Transportation [Member]    
Revenues:    
Revenues $ 3,411.2 $ 4,201.0
[1] “Other segment items” represents Product purchases and fuel.