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INCOME TAXES - Provision (Details) - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Current      
Canada $ 43 $ 29 $ (54)
Foreign 372 276 306
Total 415 305 252
Deferred      
Canada (467) (327) (224)
Foreign 641 142 166
Total 174 (185) (58)
Income Tax Expense $ 589 $ 120 $ 194