Accounts receivable, net (Details) - CAD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Total accounts receivable	$ 2,150	$ 2,066
Allowance for credit losses	(106)	(98)
Total accounts receivable, net	$ 2,044	$ 1,968