Accounts receivable, net - Schedule of Accounts Receivable (Details) - CAD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Total accounts receivable	$ 1,071	$ 1,057
Allowance for credit losses	(42)	(41)
Total accounts receivable, net	$ 1,029	$ 1,016