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Expenses by Nature - Expenses Classified by Nature (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of products and services [line items] |  |  |
Mine depreciation | $ 0 | $ 0 | $ 190
Total |  |  | 511
Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, inventories |  |  | 17
Fuel and purchased power |  |  |
Disclosure of products and services [line items] |  |  |
Gas fuel costs | 384 | 578 | 306
Coal fuel costs | 177 | 146 | 164
Royalty, land lease, other direct costs | 25 | 25 | 19
Purchased power | 474 | 514 | 339
Mine depreciation | 0 | 0 | 190
Salaries and benefits | 0 | 0 | 36
Other operating expenses | 0 | 0 | 0
Total | 1,060 | 1,263 | 1,054
Fuel and purchased power | Coal |  |  |
Disclosure of products and services [line items] |  |  |
Mine depreciation |  |  | 48
OM&A |  |  |
Disclosure of products and services [line items] |  |  |
Gas fuel costs | 0 | 0 | 0
Coal fuel costs | 0 | 0 | 0
Royalty, land lease, other direct costs | 0 | 0 | 0
Purchased power | 0 | 0 | 0
Mine depreciation | 0 | 0 | 0
Salaries and benefits | 254 | 263 | 234
Other operating expenses | 285 | 258 | 277
Total | 539 | $ 521 | 511
Write-downs | $ 14 |  | $ 28

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- Definition Adjustments for impairment loss (reversal of impairment loss) on inventories recognised in profit or loss to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Inventories; Impairment loss; Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss; Impairment loss (reversal of impairment loss) recognised in profit or loss] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 20 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_20&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of purchased energy that was sold during the period and recognised as an expense. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of all expenses directly or indirectly attributed to the goods or services sold. Attributed expenses include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, such as depreciation and maintenance of factory buildings and equipment used in the production process, unallocated production overheads, and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_99&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_103&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of depreciation expense. Depreciation is the systematic allocation of depreciable amounts of tangible assets over their useful lives. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_102&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 99 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_99&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 9 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_9&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount recognised resulting from the write-down of inventories to net realisable value or reversals of those write-downs. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 98 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_98_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Coal Fuel Expense + References No definition available. + Details
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- Definition Royalty, Rental And Other Direct Expenses + References No definition available. + Details
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- Details
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