XML 156 R79.htm IDEA: XBRL DOCUMENT
v3.20.4

Significant accounting policies - Share-Based Payments (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020
ESP |
Disclosure of terms and conditions of share-based payment arrangement [line items] |
Award vesting period | 2 years

X
- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period2 + References No definition available. + Details
Name: | bce_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod2
Namespace Prefix: | bce_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=bce_EmployeeStock1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |