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property, plant and equipment (Details) - CAD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2026 | Jun. 30, 2025 | Jun. 30, 2026 | Jun. 30, 2025 | Dec. 31, 2025
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | $ 17,503 |  |
Depreciation | $ 591 | $ 601 | 1,174 | $ 1,193 |
Property, plant and equipment at end of period | 17,819 |  | 17,819 |  |
Impairment of real estate right-of-use lease assets |  |  | 3 |  |
Contractual commitments for the acquisition of property, plant and equipment | 211 |  | 211 |  | $ 184
Owned assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 14,414 |  |
Property, plant and equipment at end of period | 15,094 |  | 15,094 |  |
Owned assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 11,595 |  |
Property, plant and equipment at end of period | 11,977 |  | 11,977 |  |
Owned assets | Buildings and leasehold improvements |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,462 |  |
Property, plant and equipment at end of period | 1,492 |  | 1,492 |  |
Owned assets | Computer hardware and other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 506 |  |
Property, plant and equipment at end of period | 500 |  | 500 |  |
Owned assets | Land |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 85 |  |
Property, plant and equipment at end of period | 82 |  | 82 |  |
Owned assets | Investment property |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 45 |  |
Property, plant and equipment at end of period | 44 |  | 44 |  |
Owned assets | Assets under construction |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 721 |  |
Property, plant and equipment at end of period | 999 |  | 999 |  |
Right-of-use lease assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 3,089 |  |
Property, plant and equipment at end of period | 2,725 |  | 2,725 |  |
Right-of-use lease assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,776 |  |
Property, plant and equipment at end of period | 1,319 |  | 1,319 |  |
Right-of-use lease assets | Real estate |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,253 |  |
Property, plant and equipment at end of period | 1,332 |  | 1,332 |  |
Right-of-use lease assets | Other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 60 |  |
Property, plant and equipment at end of period | 74 |  | 74 |  |
AT COST |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 49,821 |  |
Additions |  |  | 1,422 |  |
Assets under construction put into service |  |  |  |  |
Transfers |  |  |  |  |
Dispositions, retirements and other |  |  | (459) |  |
Net foreign exchange differences |  |  | 44 |  |
Property, plant and equipment at end of period | 50,828 |  | 50,828 |  |
AT COST | Owned assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 44,773 |  |
Additions |  |  | 830 |  |
Transfers |  |  | 1,106 |  |
Dispositions, retirements and other |  |  | (379) |  |
Net foreign exchange differences |  |  | 26 |  |
Property, plant and equipment at end of period | 46,356 |  | 46,356 |  |
AT COST | Owned assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 38,005 |  |
Additions |  |  | 388 |  |
Assets under construction put into service |  |  | 5 |  |
Transfers |  |  | 1,082 |  |
Dispositions, retirements and other |  |  | (315) |  |
Net foreign exchange differences |  |  | 3 |  |
Property, plant and equipment at end of period | 39,168 |  | 39,168 |  |
AT COST | Owned assets | Buildings and leasehold improvements |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 4,018 |  |
Additions |  |  | 11 |  |
Assets under construction put into service |  |  | 96 |  |
Dispositions, retirements and other |  |  | (33) |  |
Net foreign exchange differences |  |  | 6 |  |
Property, plant and equipment at end of period | 4,098 |  | 4,098 |  |
AT COST | Owned assets | Computer hardware and other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,898 |  |
Additions |  |  | 22 |  |
Assets under construction put into service |  |  | 36 |  |
Transfers |  |  | 24 |  |
Dispositions, retirements and other |  |  | (28) |  |
Net foreign exchange differences |  |  | 11 |  |
Property, plant and equipment at end of period | 1,963 |  | 1,963 |  |
AT COST | Owned assets | Land |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 85 |  |
Dispositions, retirements and other |  |  | (3) |  |
Property, plant and equipment at end of period | 82 |  | 82 |  |
AT COST | Owned assets | Investment property |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 46 |  |
Property, plant and equipment at end of period | 46 |  | 46 |  |
AT COST | Owned assets | Assets under construction |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 721 |  |
Additions |  |  | 409 |  |
Assets under construction put into service |  |  | (137) |  |
Net foreign exchange differences |  |  | 6 |  |
Property, plant and equipment at end of period | 999 |  | 999 |  |
AT COST | Right-of-use lease assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 5,048 |  |
Additions |  |  | 592 |  |
Transfers |  |  | (1,106) |  |
Dispositions, retirements and other |  |  | (80) |  |
Net foreign exchange differences |  |  | 18 |  |
Property, plant and equipment at end of period | 4,472 |  | 4,472 |  |
AT COST | Right-of-use lease assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 2,150 |  |
Additions |  |  | 372 |  |
Transfers |  |  | (1,106) |  |
Property, plant and equipment at end of period | 1,416 |  | 1,416 |  |
AT COST | Right-of-use lease assets | Real estate |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 2,818 |  |
Additions |  |  | 189 |  |
Dispositions, retirements and other |  |  | (76) |  |
Net foreign exchange differences |  |  | 18 |  |
Property, plant and equipment at end of period | 2,949 |  | 2,949 |  |
AT COST | Right-of-use lease assets | Other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 80 |  |
Additions |  |  | 31 |  |
Dispositions, retirements and other |  |  | (4) |  |
Property, plant and equipment at end of period | 107 |  | 107 |  |
ACCUMULATED DEPRECIATION |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 32,318 |  |
Depreciation |  |  | 1,174 |  |
Transfers |  |  |  |  |
Dispositions, retirements and other |  |  | (509) |  |
Net foreign exchange differences |  |  | 26 |  |
Property, plant and equipment at end of period | 33,009 |  | 33,009 |  |
ACCUMULATED DEPRECIATION | Owned assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 30,359 |  |
Depreciation |  |  | 961 |  |
Transfers |  |  | 335 |  |
Dispositions, retirements and other |  |  | (407) |  |
Net foreign exchange differences |  |  | 14 |  |
Property, plant and equipment at end of period | 31,262 |  | 31,262 |  |
ACCUMULATED DEPRECIATION | Owned assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 26,410 |  |
Depreciation |  |  | 793 |  |
Transfers |  |  | 324 |  |
Dispositions, retirements and other |  |  | (338) |  |
Net foreign exchange differences |  |  | 2 |  |
Property, plant and equipment at end of period | 27,191 |  | 27,191 |  |
ACCUMULATED DEPRECIATION | Owned assets | Buildings and leasehold improvements |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 2,556 |  |
Depreciation |  |  | 80 |  |
Dispositions, retirements and other |  |  | (34) |  |
Net foreign exchange differences |  |  | 4 |  |
Property, plant and equipment at end of period | 2,606 |  | 2,606 |  |
ACCUMULATED DEPRECIATION | Owned assets | Computer hardware and other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,392 |  |
Depreciation |  |  | 87 |  |
Transfers |  |  | 11 |  |
Dispositions, retirements and other |  |  | (35) |  |
Net foreign exchange differences |  |  | 8 |  |
Property, plant and equipment at end of period | 1,463 |  | 1,463 |  |
ACCUMULATED DEPRECIATION | Owned assets | Land |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at end of period | 0 |  | 0 |  |
ACCUMULATED DEPRECIATION | Owned assets | Investment property |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1 |  |
Depreciation |  |  | 1 |  |
Property, plant and equipment at end of period | 2 |  | 2 |  |
ACCUMULATED DEPRECIATION | Owned assets | Assets under construction |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at end of period | 0 |  | 0 |  |
ACCUMULATED DEPRECIATION | Right-of-use lease assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,959 |  |
Depreciation |  |  | 213 |  |
Transfers |  |  | (335) |  |
Dispositions, retirements and other |  |  | (102) |  |
Net foreign exchange differences |  |  | 12 |  |
Property, plant and equipment at end of period | 1,747 |  | 1,747 |  |
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Network assets |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 374 |  |
Depreciation |  |  | 59 |  |
Transfers |  |  | (335) |  |
Dispositions, retirements and other |  |  | (1) |  |
Property, plant and equipment at end of period | 97 |  | 97 |  |
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Real estate |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 1,565 |  |
Depreciation |  |  | 137 |  |
Dispositions, retirements and other |  |  | (97) |  |
Net foreign exchange differences |  |  | 12 |  |
Property, plant and equipment at end of period | 1,617 |  | 1,617 |  |
ACCUMULATED DEPRECIATION | Right-of-use lease assets | Other |  |  |  |  |
property, plant and equipment |  |  |  |  |
Property, plant and equipment at beginning of period |  |  | 20 |  |
Depreciation |  |  | 17 |  |
Dispositions, retirements and other |  |  | (4) |  |
Property, plant and equipment at end of period | $ 33 |  | $ 33 |  |

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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 2025-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_73_e&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2025-01-01 -Paragraph 74 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_74_c&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 201 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_201_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 201 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_201_b&doctype=Standard -URIDate 2025-03-27 + Details
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- Definition The increase (decrease) in property, plant and equipment including right-of-use assets resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [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 2025-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2025-en-r&anchor=para_73_e&doctype=Standard -URIDate 2025-03-27 + Details
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