Leases - Additional Information (Detail) $ in Millions	12 Months Ended
Dec. 31, 2019 CAD ($)
Leases Disclosure [Line Items]
Cash outflow in relation to lease obligation	$ 10
Percentage of total contract drilling revenue pertained to drilling rigs working under term contracts	59.00%
Real Estate [member] \| Bottom Of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	1 year
Real Estate [member] \| Top of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	10 years
Vehicles [member] \| Bottom Of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	3 years
Vehicles [member] \| Top of Range [Member]
Leases Disclosure [Line Items]
Terms of operating lease commitments	4 years
Rig Equipment [Member]
Leases Disclosure [Line Items]
Long-term drilling contracts	$ 1,000
Rig Equipment [Member] \| Bottom Of Range [Member]
Leases Disclosure [Line Items]
Term of operating leases under long term drilling contracts	1 year
Rig Equipment [Member] \| Top of Range [Member]
Leases Disclosure [Line Items]
Term of operating leases under long term drilling contracts	5 years

The cash outflow for leases.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph g
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_g&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Definition

The amount of income relating to variable lease payments for operating leases that do not depend on an index or a rate. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 90
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_90_b&doctype=Standard
-URIDate 2019-03-27

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- Definition

Leases disclosure.

+ References

No definition available.

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- Definition

The percentage of contract drilling revenue to drilling rigs under term contracts.

+ References

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- Definition

Term of operating lease commitments.

+ References

No definition available.

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- Definition

Term of operating leases under long term drilling contracts.

+ References

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