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Net Other Operating Expense (Income) - Disclosure of components of net other operating (income) losses (Details) - CAD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Jul. 20, 2018 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Analysis of income and expense [abstract] |  |  |  |
Alberta Off-Coal Agreement | $ (40) | $ (40) | $ (40) | $ (40)
Supplier settlements |  | 34 | 0 | 0
Onerous contract provisions |  | 14 | 29 | 0
Other trading income (expense) |  | 0 | 0 | (9)
Net other operating loss (income) |  | $ 8 | $ (11) | (49)
Insurance recoveries |  |  |  | $ 10

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- Definition The amount of income recognised from the reimbursement of a claim as a result of the occurrence of an insured event covered by an insurance contract. [Refer: Types of insurance contracts [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of operating income (expense) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_85&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of trading income (expense) that the entity does not separately disclose in the same statement or note. [Refer: Trading income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition Gain (loss) on energy supply agreement + References No definition available. + Details
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- Definition Gains (Losses) on Contract Agreement + References No definition available. + Details
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