Derivatives - Components of Commodity Swap Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivatives
Change in fair value of interest rate swap	$ 18.0	$ (22.9)	$ (4.1)	$ (19.0)
Gain (loss) on derivative activity	21.8	(22.0)	(8.0)	1.2
EnLink Midstream Partners, LP \| Commodity swaps
Derivatives
Change in fair value of interest rate swap	18.0	(22.9)	(4.1)	(19.0)
Realized gain (loss) on derivatives	3.8	0.9	(3.9)	20.2
Gain (loss) on derivative activity	$ 21.8	$ (22.0)	$ (8.0)	$ 1.2

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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