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ACQUISITIONS AND DISPOSITIONS - Schedule of Net Assets Held for Sale (Details) - Disposal group, held-for-sale, not discontinued operations - CAD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Accounts receivable and other (current assets held for sale) | $ 117 | $ 424
Deferred amounts and other assets (long-term assets held for sale) | 2,383 | 1,190
Accounts payable and other (current liabilities held for sale) | (63) | (315)
Other long-term liabilities (long-term liabilities held for sale) | (96) | (34)
Net assets held for sale | 2,341 | 1,265
Disposal group, property, plant and equipment, noncurrent | $ 2,100 | $ 1,100

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