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Pension Plans and Other Post-Retirement Benefits - Schedule of Net Benefit Expense (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of defined benefit plans [line items] |  |
Current service cost | $ 56 | $ 66
Administrative expense | 1 | 1
Net interest expense (income) | 13 | 13
Other long-term employee benefit losses (gains) | (6) | (3)
Net benefit expense | 64 | 77
Pension |  |
Disclosure of defined benefit plans [line items] |  |
Current service cost | 49 | 59
Administrative expense | 1 | 1
Net interest expense (income) | 5 | 6
Other long-term employee benefit losses (gains) | 0 | 0
Net benefit expense | 55 | 66
Post-retirement benefits |  |
Disclosure of defined benefit plans [line items] |  |
Current service cost | 7 | 7
Administrative expense | 0 | 0
Net interest expense (income) | 8 | 7
Other long-term employee benefit losses (gains) | (6) | (3)
Net benefit expense | $ 9 | $ 11

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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_a&doctype=Standard -URIDate 2022-03-24 + 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 increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [member]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 5 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_5&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 135 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_135_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Administrative Expenses, Net Defined Benefit Liability (Asset) + References No definition available. + Details
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- Definition Other Long-Term Employee Benefit Gains (Losses), Net Defined Benefit Liability (Asset) + References No definition available. + Details
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- Details
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- Details
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