CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Cash Generated From Operations
Net income	$ 137	[1]	$ 157	[1]	$ 137	[1]
Depreciation	11		15		15
Amortization of debt issue costs (Note 9)	1		2
Decrease/(increase) in other long-term liabilities	1		(1)		1
Decrease/(increase) in operating working capital (Note 12)	3		(3)		3
Total cash generated from operations	153		169		156
Investing Activities
Capital expenditures	(2)		(3)		(9)
Total investing activities	44		(548)		11
Financing Activities
Distributions paid (Note 11)	(169)		(155)		(139)
Equity issuance, net			338
Long term debt issued (Note 7)	8		894		74
Long-term debt repaid (Note 7)	(62)		(666)		(101)
Debt issue costs			(7)
Total financing activities	(223)		404		(166)
(Decrease)/increase in cash and cash equivalents	(26)		25		1
Cash and cash equivalents, beginning of year	29		4		3
Cash and cash equivalents, end of year	3		29		4
Interest payments made	24		13		9
Great Lakes
Investing Activities
Cumulative distributions in excess of equity earnings	17		13		10
Investment (Note 4)	(9)		(9)		(9)
Northern Border
Investing Activities
Cumulative distributions in excess of equity earnings	24		24		19
Investment (Note 4)			(55)
GTN
Investing Activities
Cumulative distributions in excess of equity earnings	9	[1]	21	[1]
Bison
Cash Generated From Operations
Equity earnings in excess of cumulative distributions			(1)	[1]
Investing Activities
Cumulative distributions in excess of equity earnings	5	[1]
GTN and Bison
Investing Activities
Acquisition (Note 6)			$ (539)

[1] 25 percent interests in each of GTN and Bison were acquired in May 2011.