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Segment Information - Reconciliation of Reportable Segment Operating Margin to Income (Loss) Before Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Reconciliation of reportable segment operating margin to income (loss) before income taxes:        
Depreciation and amortization expense $ (348.6) $ (332.1) $ (689.1) $ (656.9)
General and administrative expense (98.3) (81.0) (184.8) (163.4)
Other operating income (expense) 0.2   0.3 0.6
Interest expense, net (176.0) (166.6) (404.6) (334.7)
Equity earnings (loss) 2.9 3.4 5.6 3.2
Gain (loss) from financing activities (0.8)   (0.8) 0.0
Other, net 0.1 (2.2) 2.1 (5.1)
Income (loss) before income taxes 453.2 483.9 868.7 1,149.4
Gathering and Processing [Member]        
Reconciliation of reportable segment operating margin to income (loss) before income taxes:        
Operating margin [1] 572.6 502.5 1,128.9 1,040.9
Logistics and Transportation [Member]        
Reconciliation of reportable segment operating margin to income (loss) before income taxes:        
Operating margin [1] 547.7 408.0 1,079.8 937.1
Other [Member]        
Reconciliation of reportable segment operating margin to income (loss) before income taxes:        
Operating margin [1] $ (46.6) $ 151.9 $ (68.7) $ 327.7
[1] Operating margin is calculated by subtracting Product purchases and fuel and Operating expenses from Revenues.