UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	[3]	Sep. 30, 2016	[5]
Cash flows from operating activities
Net income	$ 218.2	[1],[2]	$ 204.5	[4]
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation, amortization and accretion	28.0	[2]	27.1	[4]
Non-cash interest expense	0.3		0.2
Allowance oil reduction to net realizable value	0.3		0.0
Undistributed equity earnings	(4.1)		2.7
Changes in operating assets and liabilities
Accounts receivable	(0.9)		7.3
Allowance oil	(1.7)		(3.8)
Prepaid expenses and other assets	4.4		5.0
Accounts payable	3.6		(2.3)
Deferred revenue	14.0		(0.4)
Accrued liabilities	13.9		8.2
Net cash provided by operating activities	276.0		248.5
Cash flows from investing activities
Capital expenditures	(35.5)		(28.8)
Acquisitions	(200.7)		(120.0)
Purchase price adjustment	0.4		0.0
Return of investment	12.3		9.6
April 2017 Divestiture	0.8		0.0
Net cash used in investing activities	(222.7)		(139.2)
Cash flows from financing activities
Net proceeds from public offerings	277.9		818.1
Borrowing under credit facility	580.0		296.7
Contributions from general partner	5.8		9.8
Repayment of credit facilities	(265.0)		(410.0)
Capital distributions to general partner	(429.3)		(599.2)
Distributions to noncontrolling interest	(8.6)		(17.1)
Distributions to unitholders and general partner	(190.4)		(126.0)
Net distributions to Parent	(6.3)		(16.9)
Other contributions from Parent	13.6		3.1
Proceeds from April 2017 Divestiture	20.2		0.0
Capital lease payments	(0.5)		0.0
Credit facility issuance costs	(0.7)		0.0
Net cash used in financing activities	(3.3)		(41.5)
Net increase in cash and cash equivalents	50.0		67.8
Cash and cash equivalents at beginning of the period	121.9	[6]	93.0
Cash and cash equivalents at end of the period	171.9		160.8
Non-cash investing and financing transactions
Net assets not contributed to the Partnership	(12.7)		0.0
Change in accrued capital expenditures	1.5		(5.3)
Other non-cash contributions from Parent	1.5		0.3
Other non-cash capital distributions to general partner	0.0		(7.1)
Other non-cash contribution from general partner	0.0		7.1
Other non-cash credit facilities issuance costs	$ 0.0		$ (0.6)

[1] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.

[2] The financial information for the nine months ended September 30, 2017 reflects adjustments for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations from January 1, 2017 through May 9, 2017.

[3] The financial information for the nine months ended September 30, 2017 reflects adjustments for the acquisition of the Shell Delta,Na Kika and Refinery Gas Pipeline Operations from January 1, 2017 through May 9, 2017.

[4] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.

[5] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.

[6] Prior period financial information has been retrospectively adjusted for the acquisition of the Shell Delta, Na Kika and Refinery Gas Pipeline Operations.