Investment in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Equity method investments
Contributions	$ 0.0	$ 26.6	$ 49.7	$ 26.6
Distributions	(2.2)	(0.2)	(2.3)	(0.4)
Equity in income (loss)	(4.6)	(1.2)	(4.7)	(2.3)
Total investment in unconsolidated affiliates	$ 134.3		$ 134.3		$ 90.2
GCF
Equity method investments
Ownership interest	38.75%		38.75%
Contributions	$ 0.0	0.5	$ 6.2	0.5
Distributions	(2.0)	0.0	(2.0)	0.0
Equity in income (loss)	$ (1.7)	(0.9)	$ (2.8)	(1.6)
Cedar Cove JV
Equity method investments
Ownership interest	30.00%		30.00%
Distributions	$ (0.2)	(0.2)	$ (0.3)	(0.4)
Equity in income (loss)	$ (0.5)	(0.3)	$ (1.1)	(0.7)
Matterhorn JV
Equity method investments
Ownership interest	15.00%		15.00%
Contributions	$ 0.0	26.1	$ 43.5	26.1
Equity in income (loss)	(2.4)	$ 0.0	(0.8)	$ 0.0
EnLink Midstream Partners, LP
Equity method investments
Total investment in unconsolidated affiliates	128.5		128.5		85.8
EnLink Midstream Partners, LP | GCF
Equity method investments
Total investment in unconsolidated affiliates	27.7		27.7		26.3
EnLink Midstream Partners, LP | Cedar Cove JV
Equity method investments
Total investment in unconsolidated affiliates	(5.8)		(5.8)		(4.4)
EnLink Midstream Partners, LP | Matterhorn JV
Equity method investments
Total investment in unconsolidated affiliates	$ 106.6		$ 106.6		$ 63.9