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Goodwill - Narrative (Details)
 12 Months Ended
Dec. 31, 2023
Disclosure of information for cash-generating units [line items]  
Explanation of period over which management has projected cash flows, period 5 years
BELL MEDIA  
Disclosure of information for cash-generating units [line items]  
Percent by which perpetuity growth rate must change in order for unit's recoverable amount to be equal to carrying amount (0.30%)
Percent by which discount rate must change in order for unit's recoverable amount to be equal to carrying amount 0.20%