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Property, plant and equipment - Schedule of Property, Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | $ 30,352 | $ 29,256
Ending balance | 30,001 | 30,352
Cost |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 86,836 | 83,612
Additions | 4,629 | 5,961
Business acquisitions/(business disposition) | 266 | (195)
Transfers | (1,279) | (870)
Retirements and disposals | 1,724 | 1,612
Impairment losses recognized in earnings | (180) | (42)
Reclassified to assets held for sale | (11) | (18)
Ending balance | 88,537 | 86,836
Accumulated depreciation |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | (56,484) | (54,356)
Business acquisitions/(business disposition) |  | (18)
Transfers |  | 25
Retirements and disposals | (1,661) | (1,545)
Reclassified to assets held for sale |  | (6)
Depreciation | 3,758 | 3,745
Other | (45) | (73)
Ending balance | (58,536) | (56,484)
Network infrastructure and equipment |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 23,750 | 22,639
Ending balance | 23,470 | 23,750
Network infrastructure and equipment | Cost |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 74,676 | 71,875
Additions | 2,092 | 2,990
Business acquisitions/(business disposition) | 72 | 8
Transfers | 881 | 1,368
Retirements and disposals | 1,484 | 1,557
Impairment losses recognized in earnings | (85) | 0
Reclassified to assets held for sale | (1) | (8)
Ending balance | 76,151 | 74,676
Network infrastructure and equipment | Accumulated depreciation |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | (50,926) | (49,236)
Business acquisitions/(business disposition) |  | (1)
Transfers |  | 23
Retirements and disposals | (1,447) | (1,508)
Reclassified to assets held for sale |  | (6)
Depreciation | 3,245 | 3,254
Other | (43) | (72)
Ending balance | (52,681) | (50,926)
Land and buildings |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 4,247 | 4,019
Ending balance | 4,306 | 4,247
Land and buildings | Cost |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 9,805 | 9,139
Additions | 430 | 795
Business acquisitions/(business disposition) | 184 | (103)
Transfers | 79 | 79
Retirements and disposals | 232 | 53
Impairment losses recognized in earnings | (95) | (42)
Reclassified to assets held for sale | (10) | (10)
Ending balance | 10,161 | 9,805
Land and buildings | Accumulated depreciation |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | (5,558) | (5,120)
Business acquisitions/(business disposition) |  | (17)
Transfers |  | 2
Retirements and disposals | (214) | (37)
Reclassified to assets held for sale |  | 0
Depreciation | 513 | 491
Other | (2) | (1)
Ending balance | (5,855) | (5,558)
Assets under construction |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 2,355 | 2,598
Ending balance | 2,225 | 2,355
Assets under construction | Cost |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 2,355 | 2,598
Additions | 2,107 | 2,176
Business acquisitions/(business disposition) | 10 | (100)
Transfers | (2,239) | (2,317)
Retirements and disposals | 8 | 2
Impairment losses recognized in earnings | 0 | 0
Reclassified to assets held for sale | 0 | 0
Ending balance | 2,225 | 2,355
Assets under construction | Accumulated depreciation |  |
Changes in property, plant and equipment, including right-of-use assets [abstract] |  |
Beginning balance | 0 | 0
Business acquisitions/(business disposition) |  | 0
Transfers |  | 0
Retirements and disposals | 0 | 0
Reclassified to assets held for sale |  | 0
Depreciation | 0 | 0
Other | 0 | 0
Ending balance | $ 0 | $ 0

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- Definition Acquisitions through business combinations (disposals), property, plant and equipment including right-of-use assets + References No definition available. + Details
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- Definition The amount of additions to property, plant and equipment including right-of-use assets other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment including right-of-use assets resulting from changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment including right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 + Details
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