XML 118 R83.htm IDEA: XBRL DOCUMENT v3.22.0.1
Description of Business and Segmented Disclosures - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2021
CAD ($)
Customer
plant
Dec. 31, 2020
CAD ($)
Customer
Dec. 31, 2019
CAD ($)
Customer
Disclosure of operating segments [line items]      
Number Of Major Customers | Customer 2 3 2
Gross Sales $ 48,811 $ 13,914 [1] $ 21,715 [1]
Customer One      
Disclosure of operating segments [line items]      
Gross Sales 8,500 4,300 6,900
Customer Two      
Disclosure of operating segments [line items]      
Gross Sales $ 6,800 1,800 $ 2,300
Customer Three      
Disclosure of operating segments [line items]      
Gross Sales   $ 1,500  
Bottom of range      
Disclosure of operating segments [line items]      
Percentage Of Entities Revenues From Gross Sales 10.00%    
Canada      
Disclosure of operating segments [line items]      
Number of ethanol plants | plant 2    
[1] See Note 3(w) for revisions to comparative results.