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Business Combination (Details)
$ in Millions
5 Months Ended
Jun. 03, 2020
CAD ($)
Jun. 03, 2020
CAD ($)
CMQ    
Business Acquisition [Line Items]    
Working capital adjustment   $ 3
CMQ U.S.    
Business Acquisition [Line Items]    
Goodwill $ 51 51
Intangible assets $ 27 27
Intangible asset amortization periods 20 years  
Cash and cash equivalents $ 22 $ 22