Segment Information - Financial Information and Assets (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting
Revenue from contracts with customers		$ 1,821.2	$ 933.6	$ 4,597.9	$ 2,837.8
Cost of sales, exclusive of operating expenses and depreciation and amortization	[1],[2]	(1,400.8)	(549.5)	(3,390.6)	(1,702.5)
Realized gain (loss) on derivatives		(32.4)	(2.9)	(122.3)	(0.3)
Change in fair value of derivatives		(1.2)	(2.2)	(32.9)	(8.0)
Adjusted gross margin		386.8	379.0	1,052.1	1,127.0
Operating expenses		(106.9)	(94.3)	(260.0)	(283.1)
Segment profit		279.9	284.7	792.1	843.9
Depreciation and amortization		(153.0)	(160.3)	(455.9)	(481.3)
Impairments		0.0	0.0	0.0	(354.5)
Gain on disposition of assets		0.4	1.8	0.7	(2.8)
General and administrative		(28.2)	(25.7)	(80.3)	(79.6)
Interest expense, net of interest income		(60.1)	(55.5)	(180.1)	(166.3)
Gain on extinguishment of debt		0.0	0.0	0.0	32.0
Income (loss) from unconsolidated affiliates		(2.3)	(0.2)	(9.9)	0.8
Other income		0.0	0.4	0.1	0.4
Income (loss) before non-controlling interest and income taxes		36.7	45.2	66.7	(207.4)
Capital expenditures		40.4	43.2	109.8	227.2
Related parties amount in cost of sales		4.9	2.0	11.7	6.2
Other depreciation and amortization		150.8	158.6	449.9	475.5
Permian
Segment Reporting
Revenue from contracts with customers		681.5	254.7	1,586.1	831.0
Cost of sales, exclusive of operating expenses and depreciation and amortization		(576.6)	(185.4)	(1,304.5)	(637.7)
Realized gain (loss) on derivatives		(8.7)	(0.4)	(69.8)	(0.6)
Change in fair value of derivatives		10.2	0.9	(3.0)	2.3
Adjusted gross margin		106.4	69.8	208.8	195.0
Operating expenses		(37.3)	(22.9)	(52.9)	(71.1)
Segment profit		69.1	46.9	155.9	123.9
Depreciation and amortization		(35.4)	(31.9)	(103.5)	(92.1)
Impairments					(184.6)
Gain on disposition of assets		0.1	0.0	0.2	(4.9)
General and administrative		0.0	0.0	0.0	0.0
Interest expense, net of interest income		0.0	0.0	0.0	0.0
Gain on extinguishment of debt					0.0
Income (loss) from unconsolidated affiliates		0.0	0.0	0.0	0.0
Other income			0.0	0.0	0.0
Income (loss) before non-controlling interest and income taxes		33.8	15.0	52.6	(157.7)
Capital expenditures		25.8	28.5	78.6	161.4
Louisiana
Segment Reporting
Revenue from contracts with customers		1,228.7	541.5	3,045.3	1,514.7
Cost of sales, exclusive of operating expenses and depreciation and amortization		(1,110.8)	(441.4)	(2,690.1)	(1,213.6)
Realized gain (loss) on derivatives		(14.9)	(0.6)	(32.0)	1.9
Change in fair value of derivatives		(8.8)	(2.7)	(18.6)	(7.8)
Adjusted gross margin		94.2	96.8	304.6	295.2
Operating expenses		(30.5)	(31.1)	(91.4)	(90.4)
Segment profit		63.7	65.7	213.2	204.8
Depreciation and amortization		(34.6)	(36.9)	(106.8)	(109.3)
Impairments					(169.9)
Gain on disposition of assets		0.2	0.0	0.3	0.1
General and administrative		0.0	0.0	0.0	0.0
Interest expense, net of interest income		0.0	0.0	0.0	0.0
Gain on extinguishment of debt					0.0
Income (loss) from unconsolidated affiliates		0.0	0.0	0.0	0.0
Other income			0.0	0.0	0.0
Income (loss) before non-controlling interest and income taxes		29.3	28.8	106.7	(74.3)
Capital expenditures		0.4	8.5	5.4	39.3
Oklahoma
Segment Reporting
Revenue from contracts with customers		334.0	228.9	844.5	628.7
Cost of sales, exclusive of operating expenses and depreciation and amortization		(218.0)	(101.0)	(533.9)	(255.8)
Realized gain (loss) on derivatives		(6.8)	(1.7)	(15.7)	(1.7)
Change in fair value of derivatives		(2.3)	(0.3)	(9.4)	(2.4)
Adjusted gross margin		106.9	125.9	285.5	368.8
Operating expenses		(19.8)	(20.1)	(57.3)	(62.4)
Segment profit		87.1	105.8	228.2	306.4
Depreciation and amortization		(52.3)	(53.0)	(153.6)	(163.7)
Impairments					0.0
Gain on disposition of assets		0.0	0.0	0.0	0.1
General and administrative		0.0	0.0	0.0	0.0
Interest expense, net of interest income		0.0	0.0	0.0	0.0
Gain on extinguishment of debt					0.0
Income (loss) from unconsolidated affiliates		0.0	0.0	0.0	0.0
Other income			0.0	0.0	0.0
Income (loss) before non-controlling interest and income taxes		34.8	52.8	74.6	142.8
Capital expenditures		10.3	2.6	17.1	14.1
North Texas
Segment Reporting
Revenue from contracts with customers		231.0	115.0	621.7	342.1
Cost of sales, exclusive of operating expenses and depreciation and amortization		(149.4)	(28.2)	(361.8)	(74.1)
Realized gain (loss) on derivatives		(2.0)	(0.2)	(4.8)	0.1
Change in fair value of derivatives		(0.3)	(0.1)	(1.9)	(0.1)
Adjusted gross margin		79.3	86.5	253.2	268.0
Operating expenses		(19.3)	(20.2)	(58.4)	(59.2)
Segment profit		60.0	66.3	194.8	208.8
Depreciation and amortization		(28.5)	(36.8)	(86.0)	(110.4)
Impairments					0.0
Gain on disposition of assets		0.1	1.8	0.2	1.9
General and administrative		0.0	0.0	0.0	0.0
Interest expense, net of interest income		0.0	0.0	0.0	0.0
Gain on extinguishment of debt					0.0
Income (loss) from unconsolidated affiliates		0.0	0.0	0.0	0.0
Other income			0.0	0.0	0.0
Income (loss) before non-controlling interest and income taxes		31.6	31.3	109.0	100.3
Capital expenditures		3.3	3.0	7.6	10.7
Corporate
Segment Reporting
Revenue from contracts with customers		(654.0)	(206.5)	(1,499.7)	(478.7)
Cost of sales, exclusive of operating expenses and depreciation and amortization		654.0	206.5	1,499.7	478.7
Realized gain (loss) on derivatives		0.0	0.0	0.0	0.0
Change in fair value of derivatives		0.0	0.0	0.0	0.0
Adjusted gross margin		0.0	0.0	0.0	0.0
Operating expenses		0.0	0.0	0.0	0.0
Segment profit		0.0	0.0	0.0	0.0
Depreciation and amortization		(2.2)	(1.7)	(6.0)	(5.8)
Impairments					0.0
Gain on disposition of assets		0.0	0.0	0.0	0.0
General and administrative		(28.2)	(25.7)	(80.3)	(79.6)
Interest expense, net of interest income		(60.1)	(55.5)	(180.1)	(166.3)
Gain on extinguishment of debt					32.0
Income (loss) from unconsolidated affiliates		(2.3)	(0.2)	(9.9)	0.8
Other income			0.4	0.1	0.4
Income (loss) before non-controlling interest and income taxes		(92.8)	(82.7)	(276.2)	(218.5)
Capital expenditures		0.6	0.6	1.1	1.7
Product sales
Segment Reporting
Revenue from contracts with customers		1,610.2	696.1	3,968.7	2,121.6
Product sales | Permian
Segment Reporting
Revenue from contracts with customers		354.1	129.2	854.7	548.8
Product sales | Louisiana
Segment Reporting
Revenue from contracts with customers		1,144.3	500.4	2,812.1	1,378.5
Product sales | Oklahoma
Segment Reporting
Revenue from contracts with customers		79.7	50.5	191.5	143.3
Product sales | North Texas
Segment Reporting
Revenue from contracts with customers		32.1	16.0	110.4	51.0
Product sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, Natural gas sales
Segment Reporting
Revenue from contracts with customers		432.9	179.0	1,057.2	481.3
Product sales, Natural gas sales | Permian
Segment Reporting
Revenue from contracts with customers		159.3	46.5	381.7	94.0
Product sales, Natural gas sales | Louisiana
Segment Reporting
Revenue from contracts with customers		183.2	76.4	426.4	226.6
Product sales, Natural gas sales | Oklahoma
Segment Reporting
Revenue from contracts with customers		58.2	40.1	139.7	110.0
Product sales, Natural gas sales | North Texas
Segment Reporting
Revenue from contracts with customers		32.2	16.0	109.4	50.7
Product sales, Natural gas sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, NGL sales
Segment Reporting
Revenue from contracts with customers		899.2	403.6	2,234.4	1,060.3
Product sales, NGL sales | Permian
Segment Reporting
Revenue from contracts with customers		0.4	0.1	0.9	0.2
Product sales, NGL sales | Louisiana
Segment Reporting
Revenue from contracts with customers		898.6	402.3	2,231.2	1,056.9
Product sales, NGL sales | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.3	1.2	1.3	2.9
Product sales, NGL sales | North Texas
Segment Reporting
Revenue from contracts with customers		(0.1)	0.0	1.0	0.3
Product sales, NGL sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, Crude oil and condensate sales
Segment Reporting
Revenue from contracts with customers		278.1	113.5	677.1	580.0
Product sales, Crude oil and condensate sales | Permian
Segment Reporting
Revenue from contracts with customers		194.4	82.6	472.1	454.6
Product sales, Crude oil and condensate sales | Louisiana
Segment Reporting
Revenue from contracts with customers		62.5	21.7	154.5	95.0
Product sales, Crude oil and condensate sales | Oklahoma
Segment Reporting
Revenue from contracts with customers		21.2	9.2	50.5	30.4
Product sales, Crude oil and condensate sales | North Texas
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, Crude oil and condensate sales | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales—related parties
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales—related parties | Permian
Segment Reporting
Revenue from contracts with customers		301.4	95.6	661.8	201.1
Product sales—related parties | Louisiana
Segment Reporting
Revenue from contracts with customers		39.5	3.3	93.3	13.3
Product sales—related parties | Oklahoma
Segment Reporting
Revenue from contracts with customers		180.2	85.4	430.5	208.9
Product sales—related parties | North Texas
Segment Reporting
Revenue from contracts with customers		132.7	22.1	311.5	55.1
Product sales—related parties | Corporate
Segment Reporting
Revenue from contracts with customers		(653.8)	(206.4)	(1,497.1)	(478.4)
Product sales, NGL sales, related party
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, NGL sales, related party | Permian
Segment Reporting
Revenue from contracts with customers		301.4	95.6	661.8	201.0
Product sales, NGL sales, related party | Louisiana
Segment Reporting
Revenue from contracts with customers		39.5	3.3	93.3	13.3
Product sales, NGL sales, related party | Oklahoma
Segment Reporting
Revenue from contracts with customers		180.2	85.4	430.4	209.0
Product sales, NGL sales, related party | North Texas
Segment Reporting
Revenue from contracts with customers		131.2	21.4	306.4	52.5
Product sales, NGL sales, related party | Corporate
Segment Reporting
Revenue from contracts with customers		(652.3)	(205.7)	(1,491.9)	(475.8)
Product sales, Crude oil and condensate sales, related party
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, Crude oil and condensate sales, related party | Permian
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.1
Product sales, Crude oil and condensate sales, related party | Louisiana
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Product sales, Crude oil and condensate sales, related party | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.1	(0.1)
Product sales, Crude oil and condensate sales, related party | North Texas
Segment Reporting
Revenue from contracts with customers		1.5	0.7	5.1	2.6
Product sales, Crude oil and condensate sales, related party | Corporate
Segment Reporting
Revenue from contracts with customers		(1.5)	(0.7)	(5.2)	(2.6)
Midstream services
Segment Reporting
Revenue from contracts with customers		211.0	237.5	629.2	716.2
Midstream services | Permian
Segment Reporting
Revenue from contracts with customers		26.0	29.9	69.6	81.1
Midstream services | Louisiana
Segment Reporting
Revenue from contracts with customers		44.8	37.8	137.5	122.9
Midstream services | Oklahoma
Segment Reporting
Revenue from contracts with customers		74.0	92.9	222.3	276.2
Midstream services | North Texas
Segment Reporting
Revenue from contracts with customers		66.2	76.9	199.8	236.0
Midstream services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Gathering and transportation
Segment Reporting
Revenue from contracts with customers		112.7	128.7	342.2	380.2
Midstream services, Gathering and transportation | Permian
Segment Reporting
Revenue from contracts with customers		12.8	17.9	34.3	47.3
Midstream services, Gathering and transportation | Louisiana
Segment Reporting
Revenue from contracts with customers		16.3	10.7	48.5	33.9
Midstream services, Gathering and transportation | Oklahoma
Segment Reporting
Revenue from contracts with customers		44.6	56.7	141.8	165.5
Midstream services, Gathering and transportation | North Texas
Segment Reporting
Revenue from contracts with customers		39.0	43.4	117.6	133.5
Midstream services, Gathering and transportation | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Processing
Segment Reporting
Revenue from contracts with customers		61.9	74.0	175.2	220.9
Midstream services, Processing | Permian
Segment Reporting
Revenue from contracts with customers		7.5	8.0	21.7	19.8
Midstream services, Processing | Louisiana
Segment Reporting
Revenue from contracts with customers		0.9	0.3	1.9	1.6
Midstream services, Processing | Oklahoma
Segment Reporting
Revenue from contracts with customers		26.5	32.4	70.5	97.8
Midstream services, Processing | North Texas
Segment Reporting
Revenue from contracts with customers		27.0	33.3	81.1	101.7
Midstream services, Processing | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, NGL services
Segment Reporting
Revenue from contracts with customers		16.9	14.2	56.2	52.5
Midstream services, NGL services | Permian
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, NGL services | Louisiana
Segment Reporting
Revenue from contracts with customers		16.9	14.2	56.0	52.4
Midstream services, NGL services | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, NGL services | North Texas
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.2	0.1
Midstream services, NGL services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Crude services
Segment Reporting
Revenue from contracts with customers		18.7	19.7	52.8	59.4
Midstream services, Crude services | Permian
Segment Reporting
Revenue from contracts with customers		5.5	3.8	13.0	13.0
Midstream services, Crude services | Louisiana
Segment Reporting
Revenue from contracts with customers		10.3	12.2	29.8	33.8
Midstream services, Crude services | Oklahoma
Segment Reporting
Revenue from contracts with customers		2.8	3.7	9.5	12.6
Midstream services, Crude services | North Texas
Segment Reporting
Revenue from contracts with customers		0.1	0.0	0.5	0.0
Midstream services, Crude services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Other services
Segment Reporting
Revenue from contracts with customers		0.8	0.9	2.8	3.2
Midstream services, Other services | Permian
Segment Reporting
Revenue from contracts with customers		0.2	0.2	0.6	1.0
Midstream services, Other services | Louisiana
Segment Reporting
Revenue from contracts with customers		0.4	0.4	1.3	1.2
Midstream services, Other services | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.1	0.1	0.5	0.3
Midstream services, Other services | North Texas
Segment Reporting
Revenue from contracts with customers		0.1	0.2	0.4	0.7
Midstream services, Other services | Corporate
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services—related parties
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services—related parties | Permian
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services—related parties | Louisiana
Segment Reporting
Revenue from contracts with customers		0.1	0.0	2.4	0.0
Midstream services—related parties | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.1	0.1	0.2	0.3
Midstream services—related parties | North Texas
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services—related parties | Corporate
Segment Reporting
Revenue from contracts with customers		(0.2)	(0.1)	(2.6)	(0.3)
Midstream services, Crude services, related party
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Crude services, related party | Permian
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Crude services, related party | Louisiana
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Crude services, related party | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.1	0.1	0.2	0.3
Midstream services, Crude services, related party | North Texas
Segment Reporting
Revenue from contracts with customers		0.0	0.0	0.0	0.0
Midstream services, Crude services, related party | Corporate
Segment Reporting
Revenue from contracts with customers		(0.1)	$ (0.1)	(0.2)	$ (0.3)
Midstream services, Other services, related party
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Permian
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Louisiana
Segment Reporting
Revenue from contracts with customers		0.1		2.4
Midstream services, Other services, related party | Oklahoma
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | North Texas
Segment Reporting
Revenue from contracts with customers		0.0		0.0
Midstream services, Other services, related party | Corporate
Segment Reporting
Revenue from contracts with customers		$ (0.1)		$ (2.4)

[1] Includes related party cost of sales of $11.7 million and $6.2 million for the nine months ended September 30, 2021 and 2020, respectively, and excludes all operating expenses as well as depreciation and amortization related to our operating segments of $449.9 million and $475.5 million for the nine months ended September 30, 2021 and 2020, respectively.

[2] Includes related party cost of sales of $4.9 million and $2.0 million for the three months ended September 30, 2021 and 2020, respectively, and excludes all operating expenses as well as depreciation and amortization related to our operating segments of $150.8 million and $158.6 million for the three months ended September 30, 2021 and 2020, respectively.