v3.25.4
Intangible assets (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance $ 16,786 $ 16,609
Ending balance 17,234 16,786
Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 24,751 24,110
Additions 1,750 2,202
Business acquisitions 1,185 49
Transfers 920 1,279
Retirements and disposals 657 862
Impairment losses recognized in earnings (885) (866)
Amortization included in operating costs (1,105) (1,158)
Net foreign exchange differences (8)  
Reclassified to assets held for sale (1) (3)
Ending balance 25,950 24,751
Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance (7,965) (7,501)
Transfers 4  
Retirements and disposals (630) (819)
Amortization included in operating costs 1,377 1,283
Ending balance (8,716) (7,965)
Total    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 9,742 9,815
Ending balance 9,413 9,742
Total | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 9,742 9,815
Additions 6 553
Business acquisitions 263 5
Transfers (13) 0
Retirements and disposals 0 1
Impairment losses recognized in earnings (583) (627)
Amortization included in operating costs 0 0
Net foreign exchange differences (2)  
Reclassified to assets held for sale 0 (3)
Ending balance 9,413 9,742
Total | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 0 0
Transfers 0  
Retirements and disposals 0 0
Amortization included in operating costs 0 0
Ending balance 0 0
Brands    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 2,387 2,432
Ending balance 2,562 2,387
Brands | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 2,387 2,432
Additions 0 0
Business acquisitions 233 4
Transfers (13) 0
Retirements and disposals 0 0
Impairment losses recognized in earnings (43) (49)
Amortization included in operating costs 0 0
Net foreign exchange differences (2)  
Reclassified to assets held for sale 0 0
Ending balance 2,562 2,387
Brands | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 0 0
Transfers 0  
Retirements and disposals 0 0
Amortization included in operating costs 0 0
Ending balance 0 0
Spectrum and other licences    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 6,500 5,949
Ending balance 6,519 6,500
Spectrum and other licences | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 6,500 5,949
Additions 6 553
Business acquisitions 30 1
Transfers 0 0
Retirements and disposals 0 0
Impairment losses recognized in earnings (17) 0
Amortization included in operating costs 0 0
Net foreign exchange differences 0  
Reclassified to assets held for sale 0 (3)
Ending balance 6,519 6,500
Spectrum and other licences | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 0 0
Transfers 0  
Retirements and disposals 0 0
Amortization included in operating costs 0 0
Ending balance 0 0
Broadcast licences    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 855 1,434
Ending balance 332 855
Broadcast licences | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 855 1,434
Additions 0 0
Business acquisitions 0 0
Transfers 0 0
Retirements and disposals 0 1
Impairment losses recognized in earnings (523) (578)
Amortization included in operating costs 0 0
Net foreign exchange differences 0  
Reclassified to assets held for sale 0 0
Ending balance 332 855
Broadcast licences | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 0 0
Transfers 0  
Retirements and disposals 0 0
Amortization included in operating costs 0 0
Ending balance 0 0
Total    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 7,044 6,794
Ending balance 7,821 7,044
Total | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 15,009 14,295
Additions 1,744 1,649
Business acquisitions 922 44
Transfers 933 1,279
Retirements and disposals 657 861
Impairment losses recognized in earnings (302) (239)
Amortization included in operating costs (1,105) (1,158)
Net foreign exchange differences (6)  
Reclassified to assets held for sale (1) 0
Ending balance 16,537 15,009
Total | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance (7,965) (7,501)
Transfers 4  
Retirements and disposals (630) (819)
Amortization included in operating costs 1,377 1,283
Ending balance (8,716) (7,965)
Software    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 5,483 5,152
Ending balance 5,514 5,483
Software | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 12,000 11,345
Additions 332 317
Business acquisitions 64 4
Transfers 920 1,279
Retirements and disposals 579 860
Impairment losses recognized in earnings (48) (85)
Amortization included in operating costs 0 0
Net foreign exchange differences (1)  
Reclassified to assets held for sale 0 0
Ending balance 12,688 12,000
Software | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance (6,517) (6,193)
Transfers 4  
Retirements and disposals (572) (818)
Amortization included in operating costs 1,225 1,142
Ending balance (7,174) (6,517)
Customer relation-ships    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 633 689
Ending balance 1,316 633
Customer relation-ships | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 1,818 1,778
Additions 0 0
Business acquisitions 834 40
Transfers 0 0
Retirements and disposals 43 0
Impairment losses recognized in earnings (1) 0
Amortization included in operating costs 0 0
Net foreign exchange differences (5)  
Reclassified to assets held for sale (1) 0
Ending balance 2,602 1,818
Customer relation-ships | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance (1,185) (1,089)
Transfers 0  
Retirements and disposals (23) 0
Amortization included in operating costs 124 96
Ending balance (1,286) (1,185)
Program and feature film rights    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 677 651
Ending balance 748 677
Program and feature film rights | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 677 651
Additions 1,403 1,328
Business acquisitions 23 0
Transfers 0 0
Retirements and disposals 0 0
Impairment losses recognized in earnings (250) (144)
Amortization included in operating costs (1,105) (1,158)
Net foreign exchange differences 0  
Reclassified to assets held for sale 0 0
Ending balance 748 677
Program and feature film rights | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 0 0
Transfers 0  
Retirements and disposals 0 0
Amortization included in operating costs 0 0
Ending balance 0 0
Other    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 251 302
Ending balance 243 251
Other | Cost    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance 514 521
Additions 9 4
Business acquisitions 1 0
Transfers 13 0
Retirements and disposals 35 1
Impairment losses recognized in earnings (3) (10)
Amortization included in operating costs 0 0
Net foreign exchange differences 0  
Reclassified to assets held for sale 0 0
Ending balance 499 514
Other | Accumulated amortization    
Reconciliation of changes in intangible assets and goodwill [abstract]    
Beginning balance (263) (219)
Transfers 0  
Retirements and disposals (35) (1)
Amortization included in operating costs 28 45
Ending balance $ (256) $ (263)