v3.26.3
Segment Information - Revenues and Operating Margin (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Revenues:          
Revenues $ 5,598.6 $ 4,151.2   $ 14,133.4 $ 12,972.8
Sales of Commodities [Member]          
Revenues:          
Revenues 4,722.9 3,469.9 $ 3,469.9 11,660.4 10,990.6
Fees from Midstream Services [Member]          
Revenues:          
Revenues 875.7 681.3 681.3 2,473.0 1,982.2
Gathering and Processing [Member]          
Revenues:          
Operating expenses 256.3 236.1   730.8 663.7
Other segment items [1] 1,628.4 1,000.1   2,805.6 3,321.4
Operating margin 813.6 637.6   2,249.7 1,827.4
Logistics and Transportation [Member]          
Revenues:          
Operating expenses 117.1 98.6   331.6 299.5
Other segment items [1] 3,835.8 2,726.0   8,806.9 8,869.4
Operating margin 771.0 710.2   2,492.6 1,989.3
Other [Member]          
Revenues:          
Revenues 63.1 (36.5)   55.9 (4.8)
Operating margin 63.1 (36.5)   55.9 (4.8)
Other [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues       55.9  
Corporate and Eliminations [Member]          
Revenues:          
Revenues (1,886.7)   $ (1,220.9) (3,339.7) (3,993.1)
Operating Segments [Member]          
Revenues:          
Revenues 5,535.5 4,187.7   14,077.5 3,993.1
Operating expenses 373.4 334.7   1,062.4 963.2
Other segment items [1] 5,464.2 3,726.1   11,612.5 12,190.8
Operating margin 1,584.6 1,347.8   4,742.3 3,816.7
Operating Segments [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 4,659.8 3,506.4   11,604.5 10,995.4
Operating Segments [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 875.7 681.3   2,473.0 1,982.2
Operating Segments [Member] | Gathering and Processing [Member]          
Revenues:          
Revenues 869.1 700.4   2,605.9 3,822.4
Operating Segments [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 223.9 228.1   820.3 632.1
Operating Segments [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 645.2 472.3   1,785.6 1,358.0
Operating Segments [Member] | Logistics and Transportation [Member]          
Revenues:          
Revenues 4,666.4 3,487.3   11,471.6 170.7
Operating Segments [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 4,435.9 3,278.3   10,784.2 10,363.3
Operating Segments [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 230.5 209.0   687.4 624.2
Operating Segments [Member] | Other [Member]          
Revenues:          
Revenues 63.1 (36.5)   55.9 (4.8)
Operating Segments [Member] | Other [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 63.1 (36.5)     (4.8)
Intersegment Eliminations [Member]          
Revenues:          
Revenues 1,886.7 1,220.9   3,339.7 12,977.6
Intersegment Eliminations [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 1,873.3 1,212.3   3,307.7 3,969.4
Intersegment Eliminations [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 13.4 8.6   32.0 23.7
Intersegment Eliminations [Member] | Gathering and Processing [Member]          
Revenues:          
Revenues 1,829.2 1,173.4   3,180.2 1,990.1
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 1,826.4 1,173.0   3,178.3 3,821.5
Intersegment Eliminations [Member] | Gathering and Processing [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 2.8 0.4   (1.9) 0.9
Intersegment Eliminations [Member] | Logistics and Transportation [Member]          
Revenues:          
Revenues 57.5 47.5   159.5 10,987.5
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues 46.9 39.3   129.4 147.9
Intersegment Eliminations [Member] | Logistics and Transportation [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues 10.6 8.2   30.1 22.8
Intersegment Eliminations [Member] | Corporate and Eliminations [Member]          
Revenues:          
Revenues (1,886.7) (1,220.9)   (3,339.7) (3,993.1)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Sales of Commodities [Member]          
Revenues:          
Revenues (1,873.3) (1,212.3)   (3,307.7) (3,969.4)
Intersegment Eliminations [Member] | Corporate and Eliminations [Member] | Fees from Midstream Services [Member]          
Revenues:          
Revenues (13.4) (8.6)   (32.0) (23.7)
Consolidated Revenue [Member]          
Revenues:          
Revenues 7,422.2 5,408.6   17,417.2 16,970.7
Consolidated Revenue [Member] | Gathering and Processing [Member]          
Revenues:          
Revenues 2,698.3 1,873.8   5,786.1 5,812.5
Consolidated Revenue [Member] | Logistics and Transportation [Member]          
Revenues:          
Revenues $ 4,723.9 $ 3,534.8   $ 11,631.1 $ 11,158.2
[1] “Other segment items” represents Product purchases and fuel.