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Financial Instruments and Risk Management - Financial Derivative Contracts (Details) | Dec. 31, 2020 usdPerBbl cadPerGigajoules bblPerDay gigajoulesPerDay $ / MMBTU mmbtuPerDay
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Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 10.00
Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 35.00
Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 55.00
Oil Basis Swap Jan 2021 to June 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 2,000
Oil Basis Swap Jan 2021 to June 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 13.75
Oil Basis Swap Jan 2021 to December 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 7,000
Oil Basis Swap Jan 2021 to December 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 13.68
Oil Basis Swap Apr 2021 to December 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 1,000
Oil Basis Swap Apr 2021 to December 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 11.50
Oil Basis Swap Jan 2022 to December 2022 - 1 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 6,000
Oil Basis Swap Jan 2022 to December 2022 - 1 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 12.76
Oil Basis Swap Jan 2021 to Dec 2021 - 1 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 6,000
Oil Basis Swap Jan 2021 to Dec 2021 - 1 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 5.17
Oil Basis Swap March 2021 to December 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 1,500
Oil Basis Swap March 2021 to December 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 4.50
Oil Fixed Cell Jan 2021 to December 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 4,000
Oil Fixed Cell Jan 2021 to December 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Oil Three Way Option Jan 2021 to Dec 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 500
Oil Three Way Option Jan 2021 to Dec 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 35.00
Oil Three Way Option Jan 2021 to Dec 2021 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Oil Three Way Option Jan 2021 to Dec 2021 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 49.03
Oil Three Way Option Jan 2021 to Dec 2021 - 1 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 1,500
Oil Three Way Option Jan 2021 to Dec 2021 - 1 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 35.00
Oil Three Way Option Jan 2021 to Dec 2021 - 1 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Oil Three Way Option Jan 2021 to Dec 2021 - 1 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 49.10
Oil Three Way Option Jan 2021 to Dec 2021 - 2 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 3,500
Oil Three Way Option Jan 2021 to Dec 2021 - 2 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 35.00
Oil Three Way Option Jan 2021 to Dec 2021 - 2 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Oil Three Way Option Jan 2021 to Dec 2021 - 2 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 49.50
Oil Three Way Option Jan 2021 to Dec 2021 - 3 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 10,000
Oil Three Way Option Jan 2021 to Dec 2021 - 3 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 35.00
Oil Three Way Option Jan 2021 to Dec 2021 - 3 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 45.00
Oil Three Way Option Jan 2021 to Dec 2021 - 3 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 55.00
Oil Three Way Option Jan 2021 to Dec 2021 - 4 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 2,000
Oil Three Way Option Jan 2021 to Dec 2021 - 4 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 37.00
Oil Three Way Option Jan 2021 to Dec 2021 - 4 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 42.50
Oil Three Way Option Jan 2021 to Dec 2021 - 4 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 48.00
Oil Three Way Option Jan 2022 to Dec 2022 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 1,500
Oil Three Way Option Jan 2022 to Dec 2022 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 40.00
Oil Three Way Option Jan 2022 to Dec 2022 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 50.00
Oil Three Way Option Jan 2022 to Dec 2022 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 58.10
Oil Swaption Jan 2022 to Dec 2022 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 5,000
Oil Swaption Jan 2022 to Dec 2022 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 53.00
Oil Swaption Jan 2022 to Dec 2022 - 1 |
Disclosure of detailed information about financial instruments [line items] |
Volume | bblPerDay | 5,000
Oil Swaption Jan 2022 to Dec 2022 - 1 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | 54.00
Natural Gas Fixed - Sell Jan 2021 To Jun 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | gigajoulesPerDay | 3,000
Natural Gas Fixed - Sell Jan 2021 To Jun 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | cadPerGigajoules | 2.71
Natural Gas Fixed - Sell Jan 2021 To Dec 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | gigajoulesPerDay | 16,000
Natural Gas Fixed - Sell Jan 2021 To Dec 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | cadPerGigajoules | 2.36
Natural Gas Three Way Option Jan 2021 to Dec 2021 |
Disclosure of detailed information about financial instruments [line items] |
Volume | gigajoulesPerDay | 2,500
Natural Gas Three Way Option Jan 2021 to Dec 2021 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | cadPerGigajoules | 2.40
Natural Gas Fixed - Sell Jan 2021 To Dec 2021 - 1 |
Disclosure of detailed information about financial instruments [line items] |
Volume | mmbtuPerDay | 12,000
Natural Gas Fixed - Sell Jan 2021 To Dec 2021 - 1 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 2.70
Natural Gas Three Way Option Jan 2022 to Dec 2022 |
Disclosure of detailed information about financial instruments [line items] |
Volume | mmbtuPerDay | 2,500
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 2.25
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 2.75
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 3.06
Natural Gas Three Way Option Jan 2022 to Dec 2022 |
Disclosure of detailed information about financial instruments [line items] |
Volume | mmbtuPerDay | 2,500
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price One |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 2.65
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price Two |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 2.90
Natural Gas Three Way Option Jan 2022 to Dec 2022 | Price Three |
Disclosure of detailed information about financial instruments [line items] |
Derivative price/unit | $ / MMBTU | 3.40

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