CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY - 6 months ended Jun. 30, 2019 - USD ($) shares in Millions, $ in Millions	Limited Partners Common Units	Limited Partners Class B Units	General Partner	Accumulated Other Comprehensive Income (Loss)	[1]	Non-Controlling Interest	Total
Partners' Equity at beginning of period at Dec. 31, 2018	$ 462	$ 108	$ 13	$ 8		$ 108	$ 699
Partners' Equity at beginning of period (in units) at Dec. 31, 2018	71.3	1.9
Increase (Decrease) in Partners' Equity
Net income	$ 145		3			9	157
Other comprehensive income (loss)				(13)			(13)
Distributions (Note 10)	(93)	$ (13)	(2)			(15)	(123)
Partners' Equity at end of period at Jun. 30, 2019	$ 514	$ 95	$ 14	$ (5)		$ 102	$ 720
Partners' Equity at end of period (in units) at Jun. 30, 2019	71.3	1.9

[1] Gain (loss) related to cash flow hedges reported in AOCI and expected to be reclassified to Net income in the next 12 months is estimated to be $2 million. These estimates assume constant interest rates over time; however, the amounts reclassified will vary based on actual value of interest rates at the date of settlement.