CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY - 3 months ended Mar. 31, 2018 - USD ($) shares in Millions, $ in Millions	ATM Equity Issuance Program Common Units	Limited Partners Common Units	Limited Partners Class B Units	General Partner	Accumulated Other Comprehensive Income	[1]	Non-controlling interests	Total
Partners' Equity at beginning of year at Dec. 31, 2017		$ 824	$ 110	$ 24	$ 5		$ 105	$ 1,068
Partners' Equity at beginning of year (in units) at Dec. 31, 2017		70.6	1.9
Increase (Decrease) in Partners' Equity
Net income		$ 94		2			6	102
Other comprehensive income					7			7
ATM equity issuances, net (Note 8)	$ 39	$ 39		1				40
ATM equity issuances, net (Note 8) (in units)		0.7
Distributions		$ (71)	$ (15)	(5)			(2)	(93)
Partners' Equity at end of year at Mar. 31, 2018		$ 886	$ 95	$ 22	$ 12		$ 109	$ 1,124
Partners' Equity at end of year (in units) at Mar. 31, 2018		71.3	1.9

[1] Losses related to cash flow hedges reported in Accumulated Other Comprehensive Loss and expected to be reclassified to Net income in the next 12 months are estimated to be $4 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.