v3.26.1
Business segments - Table Narrative (Detail) - CAD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Segment Reporting Information [Line Items]    
Revenue from contracts with customers $ 9,832 $ 10,135
Revenue outside the scope of ASC 606 2,584 2,331
Revenues including federal excise tax [1] 12,416 12,466
United States Exports    
Segment Reporting Information [Line Items]    
Revenues including federal excise tax $ 2,201 $ 2,791
[1]
(a) Amounts from related parties included in revenues (note 1)3,660 3,653