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CHANGE IN OPERATING WORKING CAPITAL (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
CHANGE IN OPERATING WORKING CAPITAL    
Change in accounts receivable and other $ 4 $ 7
Change in accounts payable and accrued liabilities (2) 4
Change in accounts payable to affiliates (5) 17
Change in accrued interest 4  
Change in operating working capital $ 1 $ 28