Accounts receivable, net (Details) - CAD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Total accounts receivable	$ 2,035	$ 1,976
Allowance for credit losses	(94)	(89)
Total accounts receivable, net	$ 1,941	$ 1,887