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v3.8.0.1

Provisions (Details) CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 CAD | Dec. 31, 2016 CAD
Disclosure of other provisions [line items] |  |
Beginning balance | CAD 7,323.0 | CAD 6,108.0
Liabilities incurred | 557.0 | 425.0
Change in discount rate | 255.0 | 532.0
Changes in estimates | (3.0) | (892.0)
Liabilities settled | (402.0) | (367.0)
Accretion | 247.0 | 269.0
Asset acquisitions | 5.0 | 1,356.0
Foreign exchange | (23.0) | (99.0)
Reclassified to assets held for sale |  | (9.0)
Ending balance | 7,959.0 | 7,323.0
Less: current portion | (722.0) | (781.0)
Non-current provisions | 7,237.0 | 6,542.0
Decommissioning and Restoration |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 6,746.0 | 5,505.0
Liabilities incurred | 494.0 | 279.0
Change in discount rate | 255.0 | 532.0
Changes in estimates | 92.0 | (824.0)
Liabilities settled | (353.0) | (269.0)
Accretion | 247.0 | 269.0
Asset acquisitions | 5.0 | 1,356.0
Foreign exchange | (21.0) | (98.0)
Reclassified to assets held for sale |  | (4.0)
Ending balance | 7,465.0 | 6,746.0
Less: current portion | (434.0) | (403.0)
Non-current provisions | 7,031.0 | 6,343.0
Total undiscounted amount of estimated future cash flows required | CAD 12,200.0 | CAD 11,700.0
Weighted average credit adjusted risk free interest rate | 3.70 | 3.90
Royalties |  |
Disclosure of other provisions [line items] |  |
Beginning balance | CAD 307.0 | CAD 323.0
Liabilities incurred | 29.0 | 93.0
Changes in estimates | (89.0) | (79.0)
Liabilities settled | (7.0) | (30.0)
Ending balance | 240.0 | 307.0
Less: current portion | (240.0) | (307.0)
Other |  |
Disclosure of other provisions [line items] |  |
Beginning balance | 270.0 | 280.0
Liabilities incurred | 34.0 | 53.0
Changes in estimates | (6.0) | 11.0
Liabilities settled | (42.0) | (68.0)
Foreign exchange | (2.0) | (1.0)
Reclassified to assets held for sale |  | (5.0)
Ending balance | 254.0 | 270.0
Less: current portion | (48.0) | (71.0)
Non-current provisions | CAD 206.0 | CAD 199.0

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- Definition The increase in other provisions resulting from acquisitions through business combinations. [Refer: Business combinations [member]; 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 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 decrease in other provisions resulting from the transfer of those provisions to liabilities included in disposal groups classified as held for sale. [Refer: Other provisions; Disposal groups classified as held for sale [member]] + 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 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 recognised for new other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -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 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 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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