CHANGE IN OPERATING WORKING CAPITAL (Tables)

12 Months Ended

Dec. 31, 2019

CHANGE IN OPERATING WORKING CAPITAL

Schedule of change in operating working capital

Year Ended December 31 (millions of dollars)	2019	2018	2017
Change in accounts receivable and other	9	(6)	4
Change in inventory	(2)	—	—
Change in other current assets	—	(1)	2
Change in accounts payable and accrued liabilities (a)	(11)	3	(7)
Change in accounts payable to affiliates	2	1	(3)
Change in accrued interest	(1)	—	2
Change in operating working capital	(3)	(3)	(2)

(a) Excludes certain non-cash items primarily related to capital accruals and dropdown costs.