CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY - 3 months ended Mar. 31, 2016 - USD ($) shares in Millions, $ in Millions	Limited Partners Common units	Limited Partners Class B units	General Partner	Accumulated Other Comprehensive Loss	[1]	Total
Partners' Equity at beginning of period at Dec. 31, 2015	$ 1,021	$ 107	$ 25	$ (2)		$ 1,151
Partners' Equity at beginning of period (in units) at Dec. 31, 2015	64.3	1.9
Increase (Decrease) in Partners' Equity
Net income	$ 71		2			73
Other Comprehensive Loss				(2)		(2)
ATM Equity Issuance, net (Note 7)	$ 19					19
ATM Equity Issuance (Note 7) (in units)	0.4
Acquisition of PNGTS (Note 6)	$ (72)		(1)			(73)
Distributions	(58)	$ (12)	(2)			(72)
Partners' Equity at end of period at Mar. 31, 2016	$ 981	$ 95	$ 24	$ (4)		$ 1,096
Partners' Equity at end of period (in units) at Mar. 31, 2016	64.7	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 $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.