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v3.25.4

Contract costs (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 | Dec. 31, 2024
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Opening balance | $ 1,590 | $ 1,412
Incremental costs of obtaining a contract and contract fulfillment costs | 1,035 | 969
Amortization included in operating costs | (811) | (791)
Dispositions | (6) | 0
Ending balance | $ 1,808 | $ 1,590
Bottom of range |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Contract costs, amortization period | 12 months |
Top of range |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |
Contract costs, amortization period | 84 months |

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- Definition Acquisitions (Dispositions), Assets Recognised From Costs Incurred To Obtain Or Fulfil Contracts With Customers + References No definition available. + Details
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- Definition Incremental Costs Incurred To Obtain Or Fulfill Contracts With Customers + References No definition available. + Details
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- Definition Incremental Costs Incurred To Obtain Or Fulfill Contracts With Customers, Amortization Period + References No definition available. + Details
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Paragraph 128 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&anchor=para_128_b&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_113_b&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_113_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of assets recognised from the costs to obtain or fulfil contracts with customers. The costs to obtain a contract with a customer are the incremental costs of obtaining the contract that the entity would not have incurred if the contract had not been obtained. The costs to fulfil a contract with a customer are the costs that relate directly to a contract or to an anticipated contract that the entity can specifically identify. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2025-01-01 -Paragraph 128 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2025-en-r&anchor=para_128_a&doctype=Standard -URIDate 2025-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_113_a&doctype=Standard -URIDate 2025-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective 2027-01-01 -Name IFRS -Number 19 -IssueDate 2025-01-01 -Paragraph 113 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_113_a&doctype=Standard -URIDate 2025-03-27 + Details
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