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Material accounting policies - Revenue from Contracts with Customers (Details)	12 Months Ended
	Dec. 31, 2024
Residential customers | Bell Wireless
Disclosure of performance obligations [line items]
Contract with customer, significant payment terms, duration	24 months
Business customers | Bell Wireless
Disclosure of performance obligations [line items]
Contract with customer, significant payment terms, duration	36 months
Business customers | Bell Wireline
Disclosure of performance obligations [line items]
Contract with customer, significant payment terms, duration	7 years

X

- Definition

Contract With Customer, Significant Payment Terms, Duration

+ References

No definition available.

+ Details

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Data Type:	xbrli:durationItemType
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X

- 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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Period Type:	duration

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Period Type: