CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data	3 Months Ended				9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010		Sep. 30, 2011		Sep. 30, 2010
Equity earnings from unconsolidated affiliates (Note 3)	$ 40.4	[1]	$ 35.6	[1]	$ 116.5	[1]	$ 91.8	[1]
Transmission revenues	17.6		17.4		52.5		51.8
Operating expenses	(3.4)		(3.1)		(9.9)		(9.8)
General and administrative	(1.2)		(0.9)		(7.8)		(3.3)
Depreciation	(3.7)		(3.8)		(11.4)		(11.2)
Financial charges and other	(9.0)		(6.6)		(20.8)		(19.3)
Net income	40.7	[1]	38.6	[1]	119.1	[1]	100.0	[1]
Net income allocation (Note 7)
Common units	39.9		37.8		116.7		98.0
General partner	0.8		0.8		2.4		2.0
Net income	$ 40.7	[1]	$ 38.6	[1]	$ 119.1	[1]	$ 100.0	[1]
Net income per common unit (Note 7) (in dollars per unit)	$ 0.75		$ 0.82		$ 2.33		$ 2.12
Weighted average common units outstanding (millions)	53.5		46.2		50.2		46.2
Common units outstanding, end of the period (millions)	53.5		46.2		53.5		46.2

[1] Includes equity earnings from GTN and Bison from May 3, 2011, date of acquisition, to September 30, 2011.