Accounts receivable, net (Details) - CAD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Total accounts receivable	$ 1,930	$ 1,057
Allowance for credit losses	(78)	(41)
Total accounts receivable, net	$ 1,852	$ 1,016