CONSOLIDATED STATEMENT OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
CONSOLIDATED STATEMENT OF INCOME
Transmission revenues	$ 85	$ 84		$ 253		$ 256
Equity earnings from unconsolidated affiliates (Note 3)	15	24		48		77
Operating expenses	(19)	(19)		(57)		(58)
General and administrative	(2)	(1)		(8)		(5)
Depreciation	(21)	(21)		(64)		(64)
Financial charges and other	(12)	(10)		(31)		(30)
Net income	46	57	[1]	141	[1]	176	[1]
Net income attributable to non-controlling interests	9	9		27		28
Net income attributable to controlling interests	37	48		114		148
Net income attributable to controlling interests allocation (Note 8)
Common units	36	47		112		145
General Partner	1	1		2		3
Net income allocated to partners	$ 37	$ 48		$ 114		$ 148
Net income per common unit (Note 8) - basic (in dollars per unit)	$ 0.58	$ 0.88		$ 1.94		$ 2.71
Net income per common unit (Note 8) - diluted (in dollars per unit)	$ 0.58	$ 0.88		$ 1.94		$ 2.71
Weighted average common units outstanding (millions) - basic (in units)	62.3	53.5		57.8		53.5
Weighted average common units outstanding (millions) - diluted (in units)	62.3	53.5		57.8		53.5
Common units outstanding, end of period (millions) (in units)	62.3	53.5		62.3		53.5

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