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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) | 12 Months Ended
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Dec. 31, 2020
Oil sands upgraders, extraction plants and mine facilities | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 20 years
Oil sands upgraders, extraction plants and mine facilities | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 40 years
Oil sands mine equipment | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 5 years
Oil sands mine equipment | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 15 years
Oil sands in situ processing facilities |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 30 years
Power generation and utility plants | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 30 years
Power generation and utility plants | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 40 years
Refineries and other processing plants | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 20 years
Refineries and other processing plants | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 40 years
Marketing and other distribution assets | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 10 years
Marketing and other distribution assets | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 40 years
Inspection, overhaul and turnaround activities | Minimum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 2 years
Inspection, overhaul and turnaround activities | Maximum |
Disclosure of detailed information about property, plant and equipment [line items] |
Property, Plant and Equipment, Useful Life | 5 years

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The useful life, measured as period of time, used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_c&doctype=Standard -URIDate 2020-01-01 + Details
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