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Debt due within one year - Narrative (Details) - CAD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of detailed information about borrowings [line items] |  |  |
Securitized trade receivables, maximum amount available |  | $ 2,300,000,000 | $ 1,300,000,000
Commercial paper |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Maximum borrowing capacity | $ 3,000,000,000 |  |
Unsecured revolving credit facility and expansion facility |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Maximum borrowing capacity | 3,500,000,000 |  |
Total non-committed credit facilities |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Maximum borrowing capacity | 2,953,000,000 |  |
Total non-committed credit facilities | Bell Mobility Inc. |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Maximum borrowing capacity | 794,000,000 |  |
Borrowings, uncommitted trade loan agreement | $ 600,000,000 |  |
Borrowings maturity, term | 24 months |  |

X
- Definition Borrowings Maturity, Term + References No definition available. + Details
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Namespace Prefix: | bce_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Borrowings, Uncommitted Trade Loan Agreement + References No definition available. + Details
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Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line Of Credit Facility, Maximum Borrowing Capacity1 + References No definition available. + Details
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Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Securitized Trade Receivables, Maximum Amount Available + References No definition available. + Details
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Namespace Prefix: | bce_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |