CHANGE IN OPERATING WORKING CAPITAL (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
CHANGE IN OPERATING WORKING CAPITAL
Change in accounts receivable and other	$ 2	$ 1		$ 2
Change in accounts payable and accrued liabilities	4	(9)		(2)
Change in accounts payable to affiliates(b)	11	(2)
Change in accrued interest		2
Change in operating working capital	$ 17	$ (8)	[1]

[1] Recast as discussed in Note 2 and Note 6.