GENERAL (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Supplementary cash flows information:
Interest paid (net of interest capitalized) (a)	[1]			$ 157	$ 156
Income taxes paid (b)	[2]			0	23
Interest paid associated with the ROE complaints				9
Supplementary non-cash investing and financing activities:
Additions to property, plant and equipment and other long-lived assets (c)	[3]			103	100
Allowance for equity funds used during construction		$ 9	$ 10	$ 25	26
Proceeds from Income Tax Refunds					$ 128

[1] Amount for the nine months ended September 30, 2017 includes $9 million of interest paid associated with the return on equity (“ROE”) complaints. See Note 12 to the condensed consolidated interim financial statements for information on the ROE complaints.

[2] Amount for the nine months ended September 30, 2016 does not include the income tax refund of $128 million received from the Internal Revenue Service (“IRS”) in August 2016, which resulted from the election of bonus depreciation as described in Note 4 to the condensed consolidated interim financial statements.

[3] Amounts consist of accrued liabilities for construction, labor, materials and other costs that have not been included in investing activities. These amounts have not been paid for as of September 30, 2017 or 2016, respectively, but will be or have been included as a cash outflow from investing activities when paid.