CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Transmission revenues	$ 93	$ 111	$ 206	$ 226
Equity earnings (Note 5)	30	36	84	95
Operation and maintenance expenses	(17)	(17)	(33)	(33)
Property taxes	(6)	(7)	(13)	(14)
General and administrative	(2)	(1)	(4)	(2)
Depreciation and amortization	(19)	(24)	(39)	(48)
Financial charges and other (Note 15)	(21)	(23)	(43)	(46)
Net income before taxes	58	75	158	178
Income taxes	(1)		(1)	(1)
Net Income	57	75	157	177
Net income attributable to non-controlling interests	2	2	9	8
Net income attributable to controlling interests	55	73	148	169
Net income attributable to controlling interest allocation (Note 9)
General Partner	1	1	3	3
Net income attributable to controlling interests	55	73	148	169
Common Units
Net income attributable to controlling interest allocation (Note 9)
Net income attributable to common units	$ 54	$ 72	$ 145	$ 166
Net income per common unit (Note 9) - basic and diluted (in dollars per unit)	$ 0.75	$ 1.00	$ 2.03	$ 2.33
Weighted average common units outstanding - basic and diluted (in units)	71.3	71.3	71.3	71.2
Common units outstanding, end of period (in units)	71.3	71.3	71.3	71.3