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PROPERTY, PLANT AND EQUIPMENT - Narrative (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]    
Property, plant and equipment, weighted average capitalised interest rate 4.30% 3.40%
Adjustment to cost and accumulated depreciation $ 1,209 $ 1,157