v3.26.1
RELATED PARTY TRANSACTIONS - Promissory note receivable (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
RELATED PARTY TRANSACTIONS    
Promissory notes from the parent corporation $ 996.0 $ 996.0
Quebecor Media | $160.0 million promissory note    
RELATED PARTY TRANSACTIONS    
Promissory notes from the parent corporation $ 160.0  
Interest rate on Promissory Note 4.90%  
Quebecor Media | $836.0 million promissory note    
RELATED PARTY TRANSACTIONS    
Promissory notes from the parent corporation $ 836.0  
Interest rate on Promissory Note 7.00%