Name:	cve_AcquisitionsThroughBusinessCombinationsPropertyPlantAndEquipmentAndAcquisitionsOfExplorationAndEvaluationAssets
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Additions other than through business combinations property plant and equipment and exploration and evaluation assets.

No definition available.

Name:	cve_AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipmentAndExplorationAndEvaluationAssets
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Disclosure of reportable segments.

No definition available.

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The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 16
-IssueDate 2017-01-01
-Paragraph 73
-Subparagraph e
-Clause i
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2017-03-01&anchor=para_73_e_i&doctype=Standard
-URIDate 2017-03-09

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Data Type:	xbrli:monetaryItemType
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The amount of additions to non-current assets other than financial instruments, deferred tax assets, net defined benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Financial instruments, class [member]; Non-current assets; Types of insurance contracts [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2017-01-01
-Paragraph 24
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_24_b&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2017-01-01
-Paragraph 28
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2017-03-01&anchor=para_28_e&doctype=Standard
-URIDate 2017-03-09

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Name:	ifrs-full_SegmentsAxis=cve_DeepBasinSegmentMember
Namespace Prefix:
Data Type:	na
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Name:	ifrs-full_SegmentsAxis=cve_ConventionalSegmentMember
Namespace Prefix:
Data Type:	na
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Name:	ifrs-full_SegmentsAxis=cve_RefiningAndMarketingSegmentMember
Namespace Prefix:
Data Type:	na
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