CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY - 3 months ended Mar. 31, 2017 - USD ($) shares in Millions, $ in Millions	Limited Partners Common units	Limited Partners Class B units	General Partner	Accumulated Other Comprehensive Income	[1]	Common units ATM Equity Issuance Program	Total
Partners' Equity at beginning of year at Dec. 31, 2016	$ 1,002	$ 117	$ 27				$ 1,146
Partners' Equity at beginning of year (in units) at Dec. 31, 2016	67.4	1.9
Increase (Decrease) in Partners' Equity
Net income	$ 72		3				75
Other Comprehensive Loss				$ 1			1
ATM Equity Issuance, net (Note 6)	$ 69		2			$ 69	71
ATM Equity Issuance, net (Note 6) (in units)	1.2
Reclassification of common units no longer subject to rescission (Note 6 )	$ 19						19
Distributions	(64)	$ (22)	(4)				(90)
Partners' Equity at end of year at Mar. 31, 2017	$ 1,098	$ 95	$ 28	$ 1			$ 1,222
Partners' Equity at end of year (in units) at Mar. 31, 2017	68.6	1.9

[1] Income related to cash flow hedges reported in Accumulated Other Comprehensive Income and expected to be reclassified to Net Income in the next 12 months is estimated to be $1 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.