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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Depreciation and amortization expense		$ (269.9)	$ (211.9)	$ (479.0)	$ (428.0)
General and administrative expense		(71.0)	(63.7)	(138.0)	(125.1)
Interest expense, net		(81.2)	(94.8)	(174.7)	(193.2)
Equity earnings (loss)		1.4	12.8	7.0	24.6
Gain (loss) on sale or disposition of assets		0.6	0.4	1.6	0.2
Write-down of assets		(0.5)	(1.1)	(1.0)	(4.7)
Gain (loss) from financing activities		(33.8)	(1.9)	(49.6)	(16.6)
Gain (loss) from sale of equity method investment		435.9		435.9
Other, net		0.7	0.1		0.1
Income (loss) before income taxes		774.7	162.0	966.3	404.9
Gathering and Processing [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	[1]	474.7	301.2	872.3	576.6
Logistics and Transportation [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	[1]	322.3	291.4	674.5	640.1
Other [Member]
Reconciliation of reportable segment operating margin to income (loss) before income taxes:
Operating margin	[1]	$ (4.5)	$ (70.5)	$ (182.7)	$ (69.1)

[1] Operating margin is calculated by subtracting Product purchases and fuel and Operating expenses from Revenues.