Investment in Unconsolidated Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Equity method investments
Distributions	$ 2.1	$ 20.2	$ 22.7
Contributions	0.0	0.0	0.1
Equity in income (loss)	0.6	(16.8)	13.3
Tangible asset impairment charges	$ 168.0	7.9
Gulf Coast Fractionators
Equity method investments
Ownership interest	38.75%
Distributions	$ 1.6	19.2	22.3
Equity in income (loss)	$ 3.0	16.5	15.8
Cedar Cove JV
Equity method investments
Ownership interest	30.00%
Distributions	$ 0.5	1.0	0.4
Contributions	0.0	0.0	0.1
Equity in income (loss)	(2.4)	(33.3)	$ (2.5)
EnLink Midstream Partners, LP
Equity method investments
Total investment in unconsolidated affiliates	41.6	43.1
EnLink Midstream Partners, LP \| Gulf Coast Fractionators
Equity method investments
Total investment in unconsolidated affiliates	40.6	39.2
EnLink Midstream Partners, LP \| Cedar Cove JV
Equity method investments
Total investment in unconsolidated affiliates	1.0	$ 3.9
Cedar Cove JV
Equity method investments
Tangible asset impairment charges	$ 31.4

This element represents disclosure of the aggregate cash dividends paid to the entity by unconsolidated subsidiaries.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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