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Share Capital - Schedule of Number of Shares and Stated Value of the Outstanding Shares (Details) - CAD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Schedule of Number of Shares and Stated Value of Outstanding Shares [Line Items]    
Number of shares 14,798,216 14,192,851
Stated value $ 68,530 $ 59,082
Telesat Public Shares [Member]    
Schedule of Number of Shares and Stated Value of Outstanding Shares [Line Items]    
Number of shares 14,685,375 14,080,010
Stated value $ 62,190 $ 52,742
Class C Shares [Member]    
Schedule of Number of Shares and Stated Value of Outstanding Shares [Line Items]    
Number of shares 112,841 112,841
Stated value $ 6,340 $ 6,340