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Property, plant and equipment - Additional Information (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2020 CAD ($)
Disclosure of detailed information about property, plant and equipment [line items] |
Non cash impairment charge | $ 763
Cardium [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Non cash impairment charge | 702
Peace River CGU [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Non cash impairment charge | 58
Legacy CGU [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Impairment expenses (recovery) | (16)
Corporate assets [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Non cash impairment charge | $ 19

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- Definition The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_d_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss, impairment gain or reversal of impairment loss that is recognised in profit or loss in accordance with paragraph 5.5.8 of IFRS 9 and that arises from applying the impairment requirements in Section 5.5 of IFRS 9. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 82 -Subparagraph ba -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_ba&doctype=Standard -URIDate 2020-01-01 + Details
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