CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012 Great Lakes	Sep. 30, 2011 Great Lakes	Sep. 30, 2012 Northern Border	Sep. 30, 2011 Northern Border	Sep. 30, 2012 GTN		Sep. 30, 2011 GTN		Sep. 30, 2012 Bison		Sep. 30, 2011 Bison		Sep. 30, 2011 GTN and Bison
Cash Generated From Operations
Net income	$ 107	[1],[2]	$ 119	[1],[2]
Depreciation	8		11
Amortization of debt issuance costs	1		2
Equity earnings in excess of cumulative distributions:											(7)	[2]			(4)	[2]
Decrease in long-term liabilities			(1)
Decrease in operating working capital (Note 8)	7		4
Total cash generated from operations	123		124
Investing Activities
Cumulative distributions in excess of equity earnings:					11	7	17	17	6	[2]			4	[2]
Investment					(4)	(4)		(50)
Acquisition of GTN and Bison (Note 4)																	(538)
Capital expenditures	(2)		(3)
Total investing activities	32		(571)
Financing Activities
Distributions paid (Note 7)	(127)		(113)
Equity issuance, net (Note 4)			338
Long-term debt issues (Note 5)	5		593
Long-term debt repaid (Note 5)	(55)		(361)
Debt issue costs			(7)
Total financing activities	(177)		450
Increase in cash and cash equivalents	(22)		3
Cash and cash equivalents, beginning of period	29		4
Cash and cash equivalents, end of period	$ 7		$ 7

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

[2] 25 percent interests in each of GTN and Bison were acquired in May 2011, the first distribution was received in the fourth quarter of 2011.