CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income from continuing operations	$ 607.3	$ (100.1)
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	328.9	315.7
Derivative fair value net losses	1.2	10.4
Environmental costs, net of recoveries	14.5	6.3
Distributions from investment in joint venture	28.1	0.0
Equity earnings from investment in joint venture	(28.1)	0.0
Gain on sale of assets	(67.6)	0.0
Allowance for equity used during construction	(33.2)	(35.7)
Amortization of debt issuance and hedging costs	27.4	30.5
Asset impairment	0.0	757.1
Other	(0.1)	7.8
Changes in operating assets and liabilities	(318.5)	(170.8)
Net cash provided by operating activities	559.9	821.2
Net cash (used in) provided by discontinued operations	(171.1)	139.9
Investing activities:
Capital expenditures	(417.8)	(838.3)
Changes in restricted cash	13.6	8.2
Proceeds from the sale of assets	318.9	0.0
Proceeds from the sale of Midcoast assets	1,310.0	0.0
Investments in joint venture	(1,577.3)	0.0
Distributions from investment in joint venture in excess of cumulative earnings	12.0	0.0
Other	(2.9)	(2.3)
Net cash used in investing activities	(343.5)	(832.4)
Net cash used in discontinued operations	(14.0)	(17.2)
Financing activities:
Redemption of Series 1 preferred units	(1,200.0)	0.0
Payment of Series 1 preferred unit dividends	(357.3)	0.0
Net proceeds from Class A unit issuances	1,224.5	0.0
Distributions to partners	(475.3)	(598.6)
Repayments to General Partner and affiliates	(1,706.0)	0.0
Borrowings from General Partner and affiliates	1,500.0	0.0
Net (repayments) borrowings under credit facilities	(1,065.0)	550.0
Net commercial paper borrowings (repayments)	685.9	(33.8)
Acquisition of noncontrolling interest in subsidiary	(360.3)	0.0
Sale of noncontrolling interest in subsidiary	450.1	0.0
Contributions from noncontrolling interests	1,390.3	62.4
Distributions to noncontrolling interests	(376.0)	(57.2)
Other	(0.3)	(0.8)
Net cash used in financing activities	(289.4)	(78.0)
Net cash (used in) provided by discontinued operations	229.0	(140.7)
Net decrease in cash and cash equivalents	(29.1)	(107.2)
Cash disposed as part of the Midcoast sale	(51.3)	0.0
Cash and cash equivalents at beginning of year – continuing operations	101.3	130.1
Cash and cash equivalents at beginning of year – discontinued operations	7.4	18.0
Cash and cash equivalents at end of period – continuing operations	28.3	40.9
Cash and cash equivalents at end of period – discontinued operations	$ 0.0	$ 0.0