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Property, plant and equipment - Schedule of Property, Plant and Equipment (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | $ 28,235 | $ 27,513
Ending balance | 29,256 | 28,235
COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 82,053 | 79,198
Additions | 5,893 | 5,484
Business combinations/(business disposition) | (14) | 14
Transfers | (1,087) | (1,034)
Retirements and disposals | (3,101) | (1,587)
Impairment losses recognized in earnings | (132) | (19)
Reclassified to assets held for sale |  | 3
Ending balance | 83,612 | 82,053
ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (53,818) | (51,685)
Transfers | 0 | 96
Retirements and disposals | 3,053 | 1,542
Reclassified to assets held for sale |  | (1)
Depreciation | 3,660 | 3,627
Business disposition | (21) |
Other | (48) | (47)
Ending balance | (54,356) | (53,818)
NETWORK INFRASTRUCTURE AND EQUIPMENT |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 21,801 | 21,914
Ending balance | 22,639 | 21,801
NETWORK INFRASTRUCTURE AND EQUIPMENT | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 70,923 | 69,477
Additions | 2,824 | 2,643
Business combinations/(business disposition) | 11 | 2
Transfers | 1,180 | 358
Retirements and disposals | (3,063) | (1,550)
Impairment losses recognized in earnings | 0 | (4)
Reclassified to assets held for sale |  | 3
Ending balance | 71,875 | 70,923
NETWORK INFRASTRUCTURE AND EQUIPMENT | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (49,122) | (47,563)
Transfers | 2 | (95)
Retirements and disposals | 3,025 | 1,515
Reclassified to assets held for sale |  | (1)
Depreciation | 3,195 | 3,220
Business disposition | (14) |
Other | (44) | (50)
Ending balance | (49,236) | (49,122)
LAND AND BUILDINGS |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 4,193 | 3,710
Ending balance | 4,019 | 4,193
LAND AND BUILDINGS | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 8,889 | 7,832
Additions | 394 | 326
Business combinations/(business disposition) | (28) | 12
Transfers | 51 | 771
Retirements and disposals | (35) | (37)
Impairment losses recognized in earnings | (132) | (15)
Reclassified to assets held for sale |  | 0
Ending balance | 9,139 | 8,889
LAND AND BUILDINGS | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | (4,696) | (4,122)
Transfers | (2) | 191
Retirements and disposals | 28 | 27
Reclassified to assets held for sale |  | 0
Depreciation | 465 | 407
Business disposition | (7) |
Other | (4) | 3
Ending balance | (5,120) | (4,696)
ASSETS UNDER CONSTRUCTION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 2,241 | 1,889
Ending balance | 2,598 | 2,241
ASSETS UNDER CONSTRUCTION | COST |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 2,241 | 1,889
Additions | 2,675 | 2,515
Business combinations/(business disposition) | 3 | 0
Transfers | (2,318) | (2,163)
Retirements and disposals | (3) | 0
Impairment losses recognized in earnings | 0 | 0
Reclassified to assets held for sale |  | 0
Ending balance | 2,598 | 2,241
ASSETS UNDER CONSTRUCTION | ACCUMULATED DEPRECIATION |  |
Reconciliation of changes in property, plant and equipment [abstract] |  |
Beginning balance | 0 | 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 2022-03-24 -Paragraph 73 -Subparagraph e -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2022-03-24 + 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 2022-03-24 -Paragraph 73 -Subparagraph e -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e_v&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 98 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_98_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_e&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_54_a&doctype=Standard -URIDate 2022-03-24 + Details
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