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v3.20.4

INTANGIBLE ASSETS AND GOODWILL - Finite useful lives (Details) - Customer relationships | 12 Months Ended
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Dec. 31, 2020
Minimum |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life | 3 years
Maximum |
Disclosure of detailed information about intangible assets [line items] |
Estimated useful life | 10 years

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfIntangibleAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful Lives Or Amortization Rates, Intangible Assets Other Than Goodwill, Period + References No definition available. + Details
Name: | rci_UsefulLivesOrAmortizationRatesIntangibleAssetsOtherThanGoodwillPeriod
Namespace Prefix: | rci_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsOtherThanGoodwillAxis=ifrs-full_CustomerrelatedIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |