CHANGE IN OPERATING WORKING CAPITAL - Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
CHANGE IN OPERATING WORKING CAPITAL
Change in accounts receivable and other		$ 2	$ 1
Change in accounts payable and accrued liabilities	$ (3)	4	(9)
Change in accounts payable to affiliates	(10)	11	(2)
Change in accrued interest	4		2
Change in operating working capital	$ (9)	$ 17	$ (8)	[1]

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