v3.25.2
Basis of financial statement preparation (Details) - CAD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Related Party Transaction [Line Items]        
Amounts from related parties included in revenues [1] $ 11,208 $ 13,348 $ 23,674 $ 25,597
Purchases of crude oil and products [2] 7,215 8,856 14,971 16,562
Related Party        
Related Party Transaction [Line Items]        
Amounts from related parties included in revenues 4,121 3,657 6,995 7,074
Purchases of crude oil and products $ 2,142 1,549 $ 2,569 3,222
Previously Reported | Related Party        
Related Party Transaction [Line Items]        
Amounts from related parties included in revenues   2,946   5,675
Purchases of crude oil and products   $ 838   $ 1,823
[1]
(a) Amounts from related parties included in revenues (note 1)4,121 3,657 6,995 7,074 
[2]
(b) Amounts to related parties included in purchases of crude oil and products (note 1)2,142 1,549 2,569 3,222