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INTANGIBLE ASSETS AND GOODWILL - Explanatory information about intangible assets and goodwill (Details) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Intangible assets and goodwill $ 16,282 $ 16,305 $ 12,899
Gross carrying amount      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Intangible assets and goodwill 18,240 18,249 14,835
Accumulated amortization      
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]      
Intangible assets and goodwill $ (1,958) $ (1,944) $ (1,936)