Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income (loss)	$ (134.8)	$ 57.1
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Impairments	186.5	0.0
Depreciation and amortization	152.1	138.1
Non-cash unit-based compensation	11.1	5.1
Gain on derivatives recognized in net income (loss)	(1.8)	(0.5)
Cash settlements on derivatives	4.6	3.1
Amortization of debt issue costs, net discount (premium) of notes	1.8	1.6
Variable lease expense	1.6	0.0
Distribution of earnings from unconsolidated affiliates	2.2	4.6
Income from unconsolidated affiliates	(5.3)	(3.0)
Other operating activities	(1.2)	6.1
Changes in assets and liabilities, net of assets acquired and liabilities assumed:
Accounts receivable, accrued revenue, and other	93.8	(64.2)
Natural gas and NGLs inventory, prepaid expenses, and other	3.6	9.2
Accounts payable, accrued product purchases, and other accrued liabilities	(50.2)	36.5
Net cash provided by operating activities	264.0	193.7
Cash flows from investing activities:
Additions to property and equipment	(241.5)	(181.5)
Other investing activities	0.5	2.2
Net cash used in investing activities	(241.0)	(179.3)
Cash flows from financing activities:
Proceeds from borrowings	630.0	800.5
Payments on borrowings	(581.4)	(428.6)
Payment of installment payable for EOGP acquisition	0.0	(250.0)
Debt financing costs	(5.6)	0.0
Proceeds from issuance of ENLK common units	0.0	0.9
Distribution to members	(51.0)	(47.5)
Distributions to non-controlling interests	(127.6)	(121.2)
Contributions by non-controlling interests	15.7	22.7
Other financing activities	(2.8)	(5.2)
Net cash used in financing activities	(122.7)	(28.4)
Net decrease in cash and cash equivalents	(99.7)	(14.0)
Cash and cash equivalents, beginning of period	100.4	31.2
Cash and cash equivalents, end of period	0.7	17.2
Supplemental disclosures of cash flow information:
Cash paid for interest	23.8	15.5
Non-cash investing activities:
Non-cash accrual of property and equipment	$ 9.5	$ (0.3)