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Supplementary Cash Flow Information - Summary of Supplementary Cash Flow Information (Detail) - CAD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Supplementary Cash Flow Information [Abstract]    
Total Current Assets $ 12,430 $ 11,988
Total Current Liabilities 8,021 7,305
Working Capital 4,409 4,683
Adjusted working capital 4,700 3,800
Assets Held for Sale 0 1,304
Contingent Payments 263 236
Liabilities Related to Assets Held for Sale $ 0 $ 186