XML 168 R147.htm IDEA: XBRL DOCUMENT v3.20.4
Related-Party Disclosures - Transactions with Joint Ventures (Details) - Joint ventures - CAD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of transactions between related parties [Line Items]    
Sales to related parties $ 33.4 $ 40.2
Distributions paid 2.5 0.9
Amounts owed by related parties $ 4.3 $ 8.9