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Material accounting policies (Tables)
 12 Months Ended
Dec. 31, 2024
Accounting Policies, Changes In Accounting Estimates And Errors [Abstract]  
Disclosure of intangible assets with a finite life and property plant and equipment useful life
Estimated useful life
Property, plant and equipment
Network infrastructure and equipment
2 to 40 years
Buildings
5 to 50 years
Finite-life intangible assets
Software
2 to 12 years
Customer relationships
2 to 26 years
Program and feature film rights
Up to 5 years
Disclosure of detailed information about intangible assets
Finite-life Indefinite-life
For the year ended
December 31, 2024		 Note Software Customer relation-ships Program and feature film rights Other Total Brands Spectrum and other licences Broadcast licences Total Total intangible assets
Cost
January 1, 2024 11,345  1,778  651  521  14,295  2,432  5,949  1,434  9,815  24,110 
Additions 317  —  1,328  4  1,649  —  553  —  553  2,202 
Business acquisitions 4 4  40  —  —  44  4  1  —  5  49 
Transfers 1,279  —  —  —  1,279  —  —  —  —  1,279 
Retirements and disposals (860) —  —  (1) (861) —  —  (1) (1) (862)
Impairment losses recognized in
    earnings		 8 (85) —  (144) (10) (239) (49) —  (578) (627) (866)
Amortization included in operating
    costs		 —  —  (1,158) —  (1,158) —  —  —  —  (1,158)
Reclassified to assets held for sale 16 —  —  —  —  —  —  (3) —  (3) (3)
December 31, 2024 12,000  1,818  677  514  15,009  2,387  6,500  855  9,742  24,751 
Accumulated amortization
January 1, 2024 6,193  1,089  —  219  7,501  —  —  —  —  7,501 
Amortization 1,142  96  —  45  1,283  —  —  —  —  1,283 
Retirements and disposals (818) —  —  (1) (819) —  —  —  —  (819)
December 31, 2024 6,517  1,185  —  263  7,965  —  —  —  —  7,965 
Net carrying amount
January 1, 2024 5,152  689  651  302  6,794  2,432  5,949  1,434  9,815  16,609 
December 31, 2024 5,483  633  677  251  7,044  2,387  6,500  855  9,742  16,786 
Finite-life Indefinite-life
For the year ended
December 31, 2023		 Note Software Customer
relation-
ships		 Program
and feature
film rights		 Other Total Brands Spectrum and other licences Broadcast licences Total Total intangibles assets
Cost
January 1, 2023 10,543  1,802  603  407  13,355  2,435  5,905  1,486  9,826  23,181 
Additions 471  —  1,260  149  1,880  —  53  —  53  1,933 
Business acquisitions/(business
    disposition)		 4 10  45  —  (4) 51  31  (7) —  24  75 
Transfers 897  —  —  (27) 870  —  —  —  —  870 
Retirements and disposals (576) (69) (2) (4) (651) —  (2) (9) (11) (662)
Impairment losses recognized in
    earnings		 8 —  —  (45) —  (45) (34) —  (17) (51) (96)
Amortization included in operating
    costs		 —  —  (1,165) —  (1,165) —  —  —  —  (1,165)
Reclassified to assets held for sale 16 —  —  —  —  —  —  —  (26) (26) (26)
December 31, 2023 11,345  1,778  651  521  14,295  2,432  5,949  1,434  9,815  24,110 
Accumulated amortization
January 1, 2023 5,734  1,060  —  204  6,998  —  —  —  —  6,998 
Amortization 1,033  98  —  42  1,173  —  —  —  —  1,173 
Retirements and disposals (574) (69) —  (2) (645) —  —  —  —  (645)
Transfers —  —  —  (25) (25) —  —  —  —  (25)
December 31, 2023 6,193  1,089  —  219  7,501  —  —  —  —  7,501 
Net carrying amount
January 1, 2023 4,809  742  603  203  6,357  2,435  5,905  1,486  9,826  16,183 
December 31, 2023 5,152  689  651  302  6,794  2,432  5,949  1,434  9,815  16,609