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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
SUPPLEMENTAL CASH FLOW INFORMATION |  |
Accounts receivable | $ (1,099) | $ 219
Inventories | (628) | 316
Accounts payable and accrued liabilities | 1,317 | (503)
Current portion of provisions | (14) | (110)
Income taxes payable (net) | 436 | 511
Total (increase) decrease in working capital | 12 | 433
Relating to : |  |
(Increase) decrease in non-cash working capital | (397) | 408
Decrease in non-cash working capital | 409 | 25
Total (increase) decrease in working capital | $ 12 | $ 433

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