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Property, plant and equipment - Schedule of Property, Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | $ 29,256 | $ 28,235
Impairment losses recognized in earnings | (57) | (132)
Ending balance | 30,352 | 29,256
COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 83,612 | 82,053
Additions | 5,961 | 5,893
Business disposition | (195) | (14)
Transfers | (870) | (1,087)
Retirements and disposals | 1,612 | 3,101
Impairment losses recognized in earnings | (42) | (132)
Reclassified to assets held for sale | (18) |
Ending balance | 86,836 | 83,612
ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (54,356) | (53,818)
Business disposition |  | (21)
Transfers | 25 | 0
Retirements and disposals | (1,545) | (3,053)
Reclassified to assets held for sale | 6 |
Depreciation | 3,745 | 3,660
Business disposition | (18) |
Other | (73) | (48)
Ending balance | (56,484) | (54,356)
NETWORK INFRASTRUCTURE AND EQUIPMENT |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 22,639 | 21,801
Ending balance | 23,750 | 22,639
NETWORK INFRASTRUCTURE AND EQUIPMENT | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 71,875 | 70,923
Additions | 2,990 | 2,824
Business disposition | 8 | 11
Transfers | 1,368 | 1,180
Retirements and disposals | 1,557 | 3,063
Impairment losses recognized in earnings | 0 | 0
Reclassified to assets held for sale | (8) |
Ending balance | 74,676 | 71,875
NETWORK INFRASTRUCTURE AND EQUIPMENT | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (49,236) | (49,122)
Business disposition |  | (14)
Transfers | 23 | 2
Retirements and disposals | (1,508) | (3,025)
Reclassified to assets held for sale | 6 |
Depreciation | 3,254 | 3,195
Business disposition | (1) |
Other | (72) | (44)
Ending balance | (50,926) | (49,236)
LAND AND BUILDINGS |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 4,019 | 4,193
Ending balance | 4,247 | 4,019
LAND AND BUILDINGS | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 9,139 | 8,889
Additions | 795 | 394
Business disposition | (103) | (28)
Transfers | 79 | 51
Retirements and disposals | 53 | 35
Impairment losses recognized in earnings | (42) | (132)
Reclassified to assets held for sale | (10) |
Ending balance | 9,805 | 9,139
LAND AND BUILDINGS | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (5,120) | (4,696)
Business disposition |  | (7)
Transfers | 2 | (2)
Retirements and disposals | (37) | (28)
Reclassified to assets held for sale | 0 |
Depreciation | 491 | 465
Business disposition | (17) |
Other | (1) | (4)
Ending balance | (5,558) | (5,120)
ASSETS UNDER CONSTRUCTION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 2,598 | 2,241
Ending balance | 2,355 | 2,598
ASSETS UNDER CONSTRUCTION | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 2,598 | 2,241
Additions | 2,176 | 2,675
Business disposition | (100) | 3
Transfers | (2,317) | (2,318)
Retirements and disposals | 2 | 3
Impairment losses recognized in earnings | 0 | 0
Reclassified to assets held for sale | 0 |
Ending balance | 2,355 | 2,598
ASSETS UNDER CONSTRUCTION | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 0 | 0
Business disposition |  | 0
Transfers | 0 | 0
Retirements and disposals | 0 | 0
Reclassified to assets held for sale | 0 |
Depreciation | 0 | 0
Business disposition | 0 |
Other | 0 | 0
Ending balance | $ 0 | $ 0

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of depreciation of property, plant and equipment. [Refer: Depreciation and amortisation expense; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph e -Clause vii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e_vii&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 75 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_75_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2023-03-23 Reference 2: 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 The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2023-01-01 -Paragraph 73 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2023-en-r&anchor=para_73_a&doctype=Standard -URIDate 2023-03-23 + Details
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