Consolidated statement of income (Parenthetical) - CAD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Amounts from related parties included in revenues, (note 16).	[1]	$ 17,042	$ 8,777	$ 5,107
Amounts to related parties included in purchases of crude oil and products, (note 16).	[2]	3,795	2,737	2,484
Amounts to related parties included in production and manufacturing, and selling and general expenses, (note 16).	[3]	460	420	579
Amounts to related parties included in financing, (note 16).	[4]	$ 78	$ 28	$ 61

[1] (a) Amounts from related parties included in revenues, (note 16).17,042 8,777 5,107 

[2] (b) Amounts to related parties included in purchases of crude oil and products,        (note 16). 379527372484

[3] (c) Amounts to related parties included in production and manufacturing,
       and selling and general expenses, (note 16).460420579

[4] (d) Amounts to related parties included in financing, (note 16).782861