CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Net Income	$ 33	[1]	$ 36	[1]	$ 72	[1]	$ 78	[1]
Other comprehensive income
Change associated with current period hedging transactions (Note 10)			3				7
Total comprehensive income	$ 33		$ 39		$ 72		$ 85

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