CONSOLIDATED STATEMENT OF CHANGES IN PARTNERS' EQUITY (USD $) In Millions, except Share data, unless otherwise specified		Total	Former parent Transaction between entities under common control GTN and Bison		Controlling interests	Non-controlling interests		Common Units	General Partner	Accumulated Other Comprehensive Loss
Balance at beginning of period at Dec. 31, 2012		$ 2,422	$ 673	[1]		$ 448	[1]	$ 1,275	$ 27	$ (1)
Partners' Equity (in units) at Dec. 31, 2012								53,500,000
Increase (Decrease) in Partners' Equity
Net income	[1]	141				27		112	2
Net income attributed to GTN and Bison's former parent	[1]		26					(26)
Equity issuance, net (Note 7)								373
Equity issuance, net (Note 7) (in units)								8,800,000
Equity issuance, net (Note 7)									8
Distributions paid			(37)	[1]		(38)	[1]	(134)	(3)
Excess purchase price over net acquired assets (Note 4)								(244)	(5)
Adjustment to the May 2011 acquisition (Note 7)								1
Change in fair value of cash flow hedges (Note 13)		(1)								(1)	[2]
Equity contribution (Note 12)	[1]		10			8
Former parent carrying amount of acquired entities	[1]		(672)
Balance at end of period at Sep. 30, 2013		$ 1,829			$ 1,384	$ 445	[1]	$ 1,357	$ 29	$ (2)
Partners' Equity (in units) at Sep. 30, 2013		62,300,000			62,300,000			62,300,000

[1] (a) Recast as discussed in Note 2 and Note 4.

[2] (b) Losses related to cash flow hedges reported in Accumulated Other Comprehensive Loss and expected to be reclassified to Net Income in the next 12 months are estimated to be nil. These estimates assume constant interest rates over time; however, the amounts reclassified will vary based on actual value of interest rates at the date of settlement.