XML 99 R65.htm IDEA: XBRL DOCUMENT
v3.20.4

Government grants - Additional Information (Detail) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2020 CAD ($)
Government Grants [Abstract] |
Income from government grants | $ 2.8
Reduction to operating costs | 1.8
Reduction to general and administrative costs | $ 0.6

X
- Definition The amount of income recognised in relation to government grants. [Refer: Government grants] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 20 -IssueDate 2020-01-01 -Paragraph 39 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=20&code=ifrs-tx-2020-en-r&anchor=para_39_b&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_RevenueFromGovernmentGrants
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Government grants. + References No definition available. + Details
Name: | obe_GovernmentGrantsAbstract
Namespace Prefix: | obe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Increase decrease in general and administrative costs. + References No definition available. + Details
Name: | obe_IncreaseDecreaseInGeneralAndAdministrativeCosts
Namespace Prefix: | obe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase decrease in operating costs. + References No definition available. + Details
Name: | obe_IncreaseDecreaseInOperatingCosts
Namespace Prefix: | obe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration