Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 57.1	$ 9.3
Adjustments to reconcile net income to net cash provided by operating activities:
Impairments	0.0	7.0
Depreciation and amortization	138.1	128.3
Non-cash unit-based compensation	5.1	19.4
Gain on derivatives recognized in net income	(0.5)	(2.8)
Cash settlements on derivatives	3.1	(2.9)
Amortization of debt issue costs, net (premium) discount of notes, and installment payable	1.6	7.3
Distribution of earnings from unconsolidated affiliates	4.6	0.1
Income from unconsolidated affiliates	(3.0)	(0.7)
Other operating activities	6.1	7.5
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Accounts receivable, accrued revenue, and other	(64.2)	21.5
Natural gas and NGLs inventory, prepaid expenses, and other	9.2	2.4
Accounts payable, accrued gas and crude oil purchases, and other accrued liabilities	36.5	(18.8)
Net cash provided by operating activities	193.7	177.6
Cash flows from investing activities, net of assets acquired and liabilities assumed:
Additions to property and equipment	(181.5)	(256.3)
Proceeds from sale of unconsolidated affiliate investment	0.0	189.7
Investment in unconsolidated affiliates	0.0	(6.0)
Distribution from unconsolidated affiliates in excess of earnings	1.4	2.8
Other investing activities	0.8	0.5
Net cash used in investing activities	(179.3)	(69.3)
Cash flows from financing activities:
Proceeds from borrowings	800.5	813.0
Payments on borrowings	(428.6)	(587.3)
Payment of installment payable for EnLink Oklahoma T.O. acquisition	(250.0)	(250.0)
Proceeds from issuance of ENLK common units	0.9	55.2
Distribution to members	(47.5)	(46.4)
Distributions to non-controlling interests	(121.2)	(101.1)
Contributions by non-controlling interests	22.7	20.8
Other financing activities	(5.2)	(9.2)
Net cash used in financing activities	(28.4)	(105.0)
Net increase (decrease) in cash and cash equivalents	(14.0)	3.3
Cash and cash equivalents, beginning of period	31.2	11.7
Cash and cash equivalents, end of period	17.2	15.0
Supplemental disclosures of cash flow information:
Cash paid for interest	15.5	15.9
Cash paid for income taxes	0.0	2.2
Non-cash accrual of property and equipment	$ 0.3	$ 8.2