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Other Liabilities and Provisions - Summary of Movements in Provisions (Detail) CAD in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 CAD | Dec. 31, 2017 CAD
Disclosure of other provisions [line items] |  |
Provisions, beginning balance |  | CAD 1,307
Settled during the year |  | (49)
Change in discount rate | CAD 36 | 210
Change in amount and timing of cash flows |  | 527
Accretion |  | 81
Other |  | (2)
Changes in foreign exchange rates |  | (36)
Provisions, ending balance | 2,038 | 2,038
Less current portion of provisions (Note 17) | (133) | (133)
Long-term provisions | 1,905 | 1,905
Decommissioning and Restoration Provisions [member] |  |
Disclosure of other provisions [line items] |  |
Provisions, beginning balance |  | 1,220
Settled during the year |  | (39)
Change in discount rate |  | 210
Change in amount and timing of cash flows |  | 406
Accretion |  | 81
Other |  | (2)
Changes in foreign exchange rates |  | (32)
Provisions, ending balance | 1,844 | 1,844
Less current portion of provisions (Note 17) | (83) | (83)
Long-term provisions | 1,761 | 1,761
Other [member] |  |
Disclosure of other provisions [line items] |  |
Provisions, beginning balance |  | 87
Settled during the year |  | (10)
Change in amount and timing of cash flows |  | 121
Changes in foreign exchange rates |  | (4)
Provisions, ending balance | 194 | 194
Less current portion of provisions (Note 17) | (50) | (50)
Long-term provisions | CAD 144 | CAD 144

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- Definition The amount of additional other provisions made. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_l&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The increase (decrease) in other provisions resulting from a change in discount rate. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of non-current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_l&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount used (ie incurrent and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_84_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of liabilities of uncertain timing or the amount recognised when: (a) the entity has a present obligation (legal or constructive) as a result of a past event; (b) it is probable (ie more likely than not) that an outflow of resources embodying economic benefits will be required to settle the obligation; and (c) a reliable estimate can be made of the amount of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_54_l&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Change in amount and timing of cash flows. + References No definition available. + Details
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- Definition Increase (decrease) through other change, other provisions. + References No definition available. + Details
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