Significant Accounting Policies - Narrative (Details)		1 Months Ended		12 Months Ended
Significant Accounting Policies - Narrative (Details)	May 31, 2019 USD ($)	Oct. 31, 2019 USD ($)	May 31, 2019 USD ($)	Dec. 31, 2019 USD ($) contract	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Apr. 30, 2019 USD ($)	Jan. 01, 2019 USD ($)	May 31, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in revenue from contracts with customers				$ (6,038,500,000)	$ (7,693,800,000)
Financing receivable, gross	$ 58,000,000.0		$ 58,000,000.0
Loss on secured term loan receivable				52,900,000	0	$ 0
Gas imbalance payables				5,700,000	12,400,000
Gas imbalance receivables				6,400,000	10,400,000
Depreciation				490,700,000	453,800,000	418,200,000
Retired or sold net property, plant and equipment				12,400,000	2,100,000	8,400,000
Expected proceeds from insurance settlements						6,100,000
Proceeds from sale of productive assets				14,300,000	1,700,000	2,300,000
Gain (loss) on productive assets				1,900,000	(400,000)	0
Impairment charge on property, plant, and equipment				$ 7,900,000		17,100,000
Provision for loss on contracts					9,000,000.0
Number of contracts \| contract				1
Derivative, notional amount							$ 850,000,000.0
Derivative, fixed interest rate							2.27825%
Accumulated other comprehensive loss				$ 14,500,000	2,100,000				$ 2,200,000
Allowance for bad debt				500,000	300,000
Environmental remediation expense				0	0	$ 0
Debt issuance costs, noncurrent, net				29,800,000	24,300,000
Lease liability (less than)				103,000,000.0
Other assets, net				$ 80,400,000
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability (less than)								$ 97,600,000
Other assets, net								75,300,000
Other liabilities								$ 22,600,000
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization period				5 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Amortization period				20 years
Difference between Revenue Guidance in Effect before and after Topic 606 \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in revenue from contracts with customers					$ 671,000,000.0
Percentage decrease in revenue from contracts with customers					8.00%
Louisiana
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment charge on property, plant, and equipment					$ 24,600,000
Crude and Condensate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment charge on property, plant, and equipment					$ 109,200,000
Cedar Cove Midstream, LLC [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Impairment charge on property, plant, and equipment				$ 31,400,000
Delaware Basin JV \| NPG
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Noncontrolling interest percentage				49.90%
Ascension JV \| Marathon Petroleum Corporation
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Noncontrolling interest percentage				50.00%
Minimum Volume Contract
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Contract with customer, liability				$ 154,000,000.0
Contracts with customer, revenue recognition				$ 19,700,000
White Star
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Debt instrument, periodic payment	$ 19,500,000	$ 10,750,000	$ 9,750,000

EnLink Midstream Partners, LP 10-K