Investment in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Equity method investments
Contributions	$ 8.7	$ 19.7	$ 58.4	$ 46.3
Distributions	(0.1)	(0.2)	(2.4)	(0.6)
Equity in income (loss)	1.0	(1.7)	(3.7)	(4.0)
Total investment in unconsolidated affiliates	$ 144.6		$ 144.6		$ 90.2
GCF
Equity method investments
Ownership interest	38.75%		38.75%
Contributions	$ 8.7	0.9	$ 14.9	1.4
Distributions	0.0	0.0	(2.0)	0.0
Equity in income (loss)	$ 0.3	(0.8)	$ (2.5)	(2.4)
Cedar Cove JV
Equity method investments
Ownership interest	30.00%		30.00%
Distributions	$ (0.1)	(0.2)	$ (0.4)	(0.6)
Equity in income (loss)	$ (0.6)	(0.6)	$ (1.7)	(1.3)
Matterhorn JV
Equity method investments
Ownership interest	15.00%		15.00%
Contributions	$ 0.0	18.8	$ 43.5	44.9
Equity in income (loss)	1.3	$ (0.3)	0.5	$ (0.3)
EnLink Midstream Partners, LP
Equity method investments
Total investment in unconsolidated affiliates	138.1		138.1		85.8
EnLink Midstream Partners, LP | GCF
Equity method investments
Total investment in unconsolidated affiliates	36.7		36.7		26.3
EnLink Midstream Partners, LP | Cedar Cove JV
Equity method investments
Total investment in unconsolidated affiliates	(6.5)		(6.5)		(4.4)
EnLink Midstream Partners, LP | Matterhorn JV
Equity method investments
Total investment in unconsolidated affiliates	$ 107.9		$ 107.9		$ 63.9