CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY - 6 months ended Jun. 30, 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		$ 166		3			8	177
Other comprehensive income					10		1	11
ATM equity issuances, net (Note 8)	$ 39	$ 39		1				40
ATM equity issuances, net (Note 8) (in units)		0.7
Distributions		$ (117)	$ (15)	(6)			(3)	(141)
Partners' Equity at end of year at Jun. 30, 2018		$ 912	$ 95	$ 22	$ 15		$ 111	$ 1,155
Partners' Equity at end of year (in units) at Jun. 30, 2018		71.3	1.9

[1] Gains (Losses) related to cash flow hedges reported in Accumulated Other Comprehensive Income and expected to be reclassified to Net income in the next 12 months are estimated to be $3 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.