CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified		Total		Common Units	General Partner	Accumulated Other Comprehensive Loss
Partners' equity at Dec. 31, 2008		$ 875.6		$ 891.4	$ 19.1	$ (34.9)
Partners' equity (in units) at Dec. 31, 2008		34,900,000		34,900,000
Increase (Decrease) in Partners' Equity
Net income	[1]	106.1	[2]	98.8	7.3
Net income attributed to former North Baja owner		(8.3)		(8.2)	(0.1)
Equity issuances, net (Notes 5 and 7)		265.6		260.2	5.4
Equity issuances, net (Notes 5 and 7) (in units)		11,300,000		11,300,000
Distributions paid		(117.0)		(109.4)	(7.6)
Excess purchase price over net acquired assets (Note 5)		(27.7)		(27.2)	(0.5)
Other comprehensive income		9.2				9.2
Partners' equity at Dec. 31, 2009		1,103.5		1,105.6	23.6	(25.7)
Partners' equity (in units) at Dec. 31, 2009		46,200,000		46,200,000
Increase (Decrease) in Partners' Equity
Net income	[2]	137.1		134.4	2.7
Distributions paid		(138.7)		(135.9)	(2.8)
Excess purchase price over net acquired assets (Note 5)		0.1		0.1
Other comprehensive income		10.5				10.5
Partners' equity at Dec. 31, 2010		1,112.5		1,104.2	23.5	(15.2)
Partners' equity (in units) at Dec. 31, 2010		46,200,000		46,200,000
Increase (Decrease) in Partners' Equity
Net income	[3]	157.4	[2]	154.3	3.1
Equity issuances, net (Notes 5 and 7)		337.6		330.9	6.7
Equity issuances, net (Notes 5 and 7) (in units)		7,300,000		7,300,000
Distributions paid		(154.8)		(151.7)	(3.1)
Excess purchase price over net acquired assets (Note 5)		(133.6)		(130.9)	(2.7)
Other comprehensive income		13.9				13.9
Partners' equity at Dec. 31, 2011		$ 1,333.0		$ 1,306.8	$ 27.5	$ (1.3)
Partners' equity (in units) at Dec. 31, 2011		53,500,000		53,500,000

[1] Recast as discussed in Notes 2 and 5.

[2] Recast as discussed in Notes 2 and 5 and includes equity earnings from GTN and Bison from May 3, 2011, date of acquisition, to December 31, 2011.

[3] Includes equity earnings from GTN and Bison from May 3, 2011, date of acquisition, to December 31, 2011.