Derivatives - Components of Commodity Swap Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivatives
Change in fair value of interest rate swap	$ 4.0	$ 5.3	$ (22.1)	$ 3.9
Gain (loss) on derivative activity	(0.8)	11.3	(29.8)	23.2
EnLink Midstream Partners, LP \| Commodity swaps
Derivatives
Change in fair value of interest rate swap	4.0	5.3	(22.1)	3.9
Realized gain (loss) on derivatives	(4.8)	6.0	(7.7)	19.3
Gain (loss) on derivative activity	$ (0.8)	$ 11.3	$ (29.8)	$ 23.2

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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