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Financial Instruments And Risk Management - Financial Assets (Details) - CAD CAD in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Derivatives |  |
Financial Assets Offsetting |  |
Gross Assets | CAD 1,126 | CAD 1,765
Gross Liabilities Offset | (1,052) | (1,610)
Net Amounts Presented | 74 | 155
Trade receivables |  |
Financial Assets Offsetting |  |
Gross Assets | 2,405 | 2,058
Gross Liabilities Offset | (1,252) | (946)
Net Amounts Presented | 1,153 | 1,112
Financial assets |  |
Financial Assets Offsetting |  |
Gross Assets | 3,531 | 3,823
Gross Liabilities Offset | (2,304) | (2,556)
Net Amounts Presented | CAD 1,227 | CAD 1,267

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- Definition The gross amount of recognised financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 13C -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_13C_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of financial liabilities set off against financial assets when an entity: (a) currently has a legally enforceable right to set off the recognised amounts; and (b) intends either to settle on a net basis or to realise the asset and settle the liability simultaneously. [Refer: Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 13C -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_13C_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The net amount of financial assets that are subject either to offsetting or to an enforceable master netting arrangement or similar agreement, presented in the statement of financial position. [Refer: Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 13C -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_13C_c&doctype=Standard -URIDate 2017-03-09 + Details
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