Supplemental Cash Flow Information (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 07, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental disclosures of cash flow information:
Cash paid for interest		$ 186.3	$ 165.9	$ 133.7
Cash paid (refunded) for income taxes		2.2	3.3	(7.0)
Other Noncash Investing and Financing Items [Abstract]
Non-cash accrual of property and equipment		6.8	(22.7)	13.1
Discounted secured term loan receivable from contract restructuring		47.7	0.0	0.0
EOGP
Non-cash financing activities:
Installment payable, net of discount of $79.1 million	$ 420.9
Installment payable discount	$ 79.1
Non-cash issuance of common units		0.0	0.0	214.9
EOGP | EnLink Midstream Partners, LP
Non-cash financing activities:
Installment payable, net of discount of $79.1 million		$ 0.0	$ 0.0	420.9
Installment payable discount				$ 79.1