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INTANGIBLE ASSETS AND GOODWILL - Explanatory information about intangible assets and goodwill (Details) - CAD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | $ 12,899 | $ 12,828 | $ 11,110
Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 15,174 | 15,092 | 13,339
Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (1,936) | (1,925) | (1,890)
Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (339) | (339) | (339)
Customer relationships |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 34 | 33 | 47
Customer relationships | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 1,623 | 1,611 | 1,609
Customer relationships | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (1,589) | (1,578) | (1,562)
Customer relationships | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 0 | 0 | 0
Acquired program rights |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 151 | 171 | 188
Acquired program rights | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 233 | 253 | 251
Acquired program rights | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (77) | (77) | (58)
Acquired program rights | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (5) | (5) | (5)
Goodwill |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 3,973 | 3,923 | 3,905
Goodwill | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 4,194 | 4,144 | 4,126
Goodwill | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 0 | 0 | 0
Goodwill | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (221) | (221) | (221)
Total intangible assets |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 8,926 | 8,905 | 7,205
Total intangible assets | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 10,980 | 10,948 | 9,213
Total intangible assets | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (1,936) | (1,925) | (1,890)
Total intangible assets | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (118) | (118) | (118)
Spectrum licences |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 8,371 | 8,331 | 6,600
Spectrum licences | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 8,371 | 8,331 | 6,600
Spectrum licences | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 0 | 0 | 0
Spectrum licences | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 0 | 0 | 0
Broadcast licences |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 234 | 234 | 234
Broadcast licences | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 333 | 333 | 333
Broadcast licences | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 0 | 0 | 0
Broadcast licences | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (99) | (99) | (99)
Brand names |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 136 | 136 | 136
Brand names | Cost prior to impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | 420 | 420 | 420
Brand names | Accumulated amortization |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | (270) | (270) | (270)
Brand names | Accumulated impairment losses |  |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |  |
Intangible assets and goodwill | $ (14) | $ (14) | $ (14)

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