CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash Generated From Operations
Net income	$ 108	$ 112
Depreciation	42	43
Amortization of debt issue costs	1	1
Change in other liabilities		1
Equity allowance for funds used during construction	(1)
Change in operating working capital (Note 10)	1	28
Total cash generated from operations	151	185
Investing Activities
Investment in Great Lakes	(4)	(4)
Adjustment to 2013 acquisition (Note 11)		(25)
Acquisition of the remaining 30 percent interest in GTN (Note 6)	(264)
Capital expenditures	(12)	(5)
Other	(1)	1
Total investing activities	(258)	(18)
Financing Activities
Distributions paid (Note 9)	(110)	(103)
Distributions paid to non-controlling interests	(9)	(29)
ATM Equity issuance, net (Note 7)	26
Equity contribution by the General Partner (Note 6)	2
Long-term debt issued, net of discount	424	15
Long-term debt repaid	(205)	(30)
Debt issuance costs	(3)
Total financing activities	125	(147)
Increase/(decrease) in cash and cash equivalents	18	20
Cash and cash equivalents, beginning of period	26	25
Cash and cash equivalents, end of period	44
Northern Border
Investing Activities
Cumulative distributions in excess of equity earnings	13	8
Great Lakes
Investing Activities
Cumulative distributions in excess of equity earnings	$ 10	$ 7