Financial Instruments - Narrative (Detail) - CAD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Disclosure of detailed information about financial instruments [Line Items]
Long-Term Debt	$ 7,199	$ 7,108
Level 2 of fair value hierarchy
Disclosure of detailed information about financial instruments [Line Items]
Debt, fair value	$ 6,800	$ 6,600

The amount of current borrowings and current portion of non-current borrowings. [Refer: Borrowings]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant