Interest Expense - Schedule of Interest Expense (Details) - CAD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Schedule of Interest Expense [Abstract]
Interest on indebtedness	$ 58,919	$ 55,455	$ 172,824	$ 173,411
Interest on satellite performance incentive payments	227	278	716	881
Interest on significant financing component	2,993	3,371	9,372	10,518
Interest on employee benefit plans, net	(268)	(38)	(801)	(116)
Interest on leases	523	377	1,558	1,121
Capitalized interest	(8,197)		(19,177)
Interest expense	$ 54,197	$ 59,443	$ 164,492	$ 185,815

The amount of expense arising from interest.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2025-01-01
-Paragraph 28
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_28_e&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2025-01-01
-Paragraph B13
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2025-en-r&anchor=para_B13_f&doctype=Appendix&subtype=B
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2025-01-01
-Paragraph 23
-Subparagraph d
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2025-en-r&anchor=para_23_d&doctype=Standard
-URIDate 2025-03-27

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