Segment Information - Other Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Other financial information [Abstract]
Total assets		$ 19,389.9		$ 19,389.9		$ 15,208.2
Operating Segments [Member]
Other financial information [Abstract]
Total assets	[1]	19,389.9	$ 15,972.7	19,389.9	$ 15,972.7
Goodwill		45.2	45.2	45.2	45.2
Capital expenditures		369.1	117.5	775.3	316.5
Operating Segments [Member] | Gathering and Processing [Member]
Other financial information [Abstract]
Total assets	[1]	12,126.3	8,560.6	12,126.3	8,560.6
Goodwill		45.2	45.2	45.2	45.2
Capital expenditures		222.0	98.0	551.7	265.4
Operating Segments [Member] | Logistics and Transportation [Member]
Other financial information [Abstract]
Total assets	[1]	7,067.6	7,180.5	7,067.6	7,180.5
Capital expenditures		139.1	16.8	206.9	42.0
Operating Segments [Member] | Other [Member]
Other financial information [Abstract]
Total assets	[1]	1.5	42.3	1.5	42.3
Operating Segments [Member] | Corporate and Eliminations [Member]
Other financial information [Abstract]
Total assets	[1]	194.5	189.3	194.5	189.3
Capital expenditures		$ 8.0	$ 2.7	$ 16.7	$ 9.1

[1] Assets in the Corporate and Eliminations column primarily include tax-related assets, cash, prepaids and debt issuance costs for our revolving credit facilities.