CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data	3 Months Ended				6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010		Jun. 30, 2011		Jun. 30, 2010
Equity earnings from unconsolidated affiliates (Note 3)	$ 37.5	[1]	$ 25.3	[1]	$ 76.1	[1]	$ 56.2	[1]
Transmission revenues	17.6		17.0		34.9		34.4
Operating expenses	(3.4)		(3.3)		(6.5)		(6.7)
General and administrative	(4.8)		(1.1)		(6.6)		(2.4)
Depreciation	(4.0)		(3.7)		(7.7)		(7.4)
Financial charges and other	(6.8)		(6.5)		(11.8)		(12.7)
Net income	36.1	[1]	27.7	[1]	78.4	[1]	61.4	[1]
Net income allocation (Note 7)
Common units	35.4		27.2		76.8		60.2
General partner	0.7		0.5		1.6		1.2
Net income allocated to partners	$ 36.1		$ 27.7		$ 78.4		$ 61.4
Net income per common unit (Note 7) (in dollars per unit)	$ 0.69		$ 0.59		$ 1.58		$ 1.30
Weighted average common units outstanding (millions) (in units)	50.9		46.2		48.6		46.2
Common units outstanding, end of the period (millions) (in units)	53.5		46.2		53.5		46.2

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