CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY (USD $) In Millions, unless otherwise specified	Total		Common Units	General Partner	Accumulated Other Comprehensive Loss
Partners' equity at Dec. 31, 2011	$ 1,333		$ 1,307	$ 27	$ (1)
Partners' equity (in units) at Dec. 31, 2011			53.5
Increase (Decrease) in Partners' Equity
Net income	107	[1],[2]	105	2
Distributions paid	(127)		(124)	(3)
Partners' equity at Sep. 30, 2012	$ 1,313		$ 1,288	$ 26	$ (1)
Partners' equity (in units) at Sep. 30, 2012			53.5

[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.