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CASH FLOW – OTHER ITEMS | 12 Months Ended
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Dec. 31, 2017
Cash Flow Statement [Abstract] |
CASH FLOW – OTHER ITEMS | CASH FLOW – OTHER ITEMS Operating Cash Flows - Other Items
For the years ended December 31 | 2017 |  | 2016 |
Adjustments for non-cash income statement items: |  |
Gain on non-hedge derivatives (note 25e) |  | ($6 | ) |  | ($12 | )
Stock-based compensation expense | 80 |  | 82 |
Income from investment in equity investees (note 16) | (76 | ) | (20 | )
Change in estimate of rehabilitation costs at closed mines | 55 |  | 130 |
Net inventory impairment charges (note 17) | 21 |  | 68 |
Change in other assets and liabilities | (196 | ) | (249 | )
Settlement of rehabilitation obligations | (59 | ) | (62 | )
Other operating activities |  | ($181 | ) |  | ($63 | )
Cash flow arising from changes in: |  |
Accounts receivable |  | $8 |  |  | ($5 | )
Inventory | (372 | ) | (190 | )
Other current assets | (278 | ) | (72 | )
Accounts payable | (35 | ) | (190 | )
Other current liabilities | (51 | ) | 29 |
Change in working capital |  | ($728 | ) |  | ($428 | )

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- Definition The entire disclosure for a statement of cash flows. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Section Presentation of a statement of cash flows -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=sect_Presentationofastatementofcashflows&doctype=Standard -URIDate 2017-03-09 + Details
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