Derivatives - Components of Gain (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivatives
Gain (loss) on derivative activity	$ (22.4)	$ 6.9	$ (3.2)	$ 8.7
EnLink Midstream Partners, LP \| Commodity swaps
Derivatives
Change in fair value of derivatives	(18.8)	7.2	(5.8)	5.2
Realized gain (loss) on derivatives	(3.6)	(0.3)	2.6	3.5
Gain (loss) on derivative activity	$ (22.4)	$ 6.9	$ (3.2)	$ 8.7

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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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
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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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