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Post-employment benefit plans - Interest Cost (Details) - CAD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | $ 17 | $ 27 | $ 33 | $ 54
DB pension |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | 25 | 37 | 49 | 74
OPEBs |  |  |  |
Disclosure of defined benefit plans [line items] |  |  |  |
Total net return on post-employment benefit plans | $ (8) | $ (10) | $ (16) | $ (20)

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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 2023-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_b&doctype=Standard -URIDate 2023-03-23 + Details
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- Details
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- Details
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