v3.26.1
Segment Information - Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) (Details) - CAD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue $ 79,493 $ 106,106 $ 166,553   $ 222,855
Operating expenses, net of share-based compensation and non-recurring items (57,400) [1] (47,442) [1] (109,319) [1]   (96,784)
Adjusted EBITDA 22,093 [1] 58,664 [1] 57,234 [1]   126,071
Share-based compensation (3,810) (2,351) (6,939)   (5,592)
Non-recurring items (518) (763) [2] (806) [2]   (1,222)
Depreciation (22,064) (25,914) (44,194)   (51,823)
Amortization (8,729) (11,639) (17,340)   (22,538)
Other operating gains (losses), net 293 (131) (82,054)   3,819
Operating income (12,735) 17,866 (94,099)   48,715
Interest expense (50,446) (53,631) (100,404)   (110,295)
Gain (loss) on change in fair value of financial instruments (471,925) (13,248) (487,746)   (46,660)
Interest and other income 1,864 6,834 6,013   13,042
Gain on repurchase of debt 6,896   6,896
Gain (loss) on foreign exchange (19,900) 114,610 (37,206)   117,090
Income (loss) before income taxes (553,142) 79,327 (713,442)   28,788
Tax (expense) recovery (5,408) (3,798) 3,943   (4,716)
Net income (loss) (558,550) 75,529 (709,499) $ (554,289) 24,072
Capital expenditures 146,488 206,242 299,109   384,770
Broadcast [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 35,894 51,226 71,604   106,282
Enterprise [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 40,873 52,590 89,774   109,433
Consulting and Other [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 2,726 2,290 5,175   7,140
GEO [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 78,120 105,747 163,748   220,880
Operating expenses, net of share-based compensation and non-recurring items (35,064) [1] (30,928) [1] (65,470) [1]   (60,588)
Adjusted EBITDA 43,056 [1] 74,819 [1] 98,278 [1]   160,292
Capital expenditures 1,537 1,851 2,183   2,259
GEO [Member] | Broadcast [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 35,894 51,226 71,604   106,282
GEO [Member] | Enterprise [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 40,873 52,590 89,709   109,433
GEO [Member] | Consulting and Other [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 1,353 1,931 2,435   5,165
Other [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue [3]  
Operating expenses, net of share-based compensation and non-recurring items [3] (1,935) [1] (740) [1] (3,743) [1]   (1,944)
Adjusted EBITDA [3] (1,935) [1] (740) [1] (3,743) [1]   (1,944)
Capital expenditures [3]  
Other [Member] | Broadcast [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue [3]  
Other [Member] | Enterprise [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue [3]  
Other [Member] | Consulting and Other [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue [3]  
LEO [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 1,373 359 2,805   1,975
Operating expenses, net of share-based compensation and non-recurring items (20,401) [1] (15,774) [1] (40,106) [1]   (34,252)
Adjusted EBITDA (19,028) [1] (15,415) [1] (37,301) [1]   (32,277)
Capital expenditures 144,951 204,391 296,926   382,511
LEO [Member] | Broadcast [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue  
LEO [Member] | Enterprise [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue 65  
LEO [Member] | Consulting and Other [Member]          
Schedule of CODM and the Reconciliation Thereof to the Net Income (Loss) [Line Items]          
Revenue $ 1,373 $ 359 $ 2,740   $ 1,975
[1] The performance of each segment is evaluated by the CODM based on Adjusted EBITDA. Adjusted EBITDA is defined as operating income (excluding certain operating expenses such as share-based compensation expenses and unusual and non-recurring items, including restructuring related expenses) before interest expense, taxes, depreciation and amortization. Adjusted EBITDA margin is used to measure Telesat’s operating performance.
[2] Non-recurring payments include severance payments and special compensation and benefits.
[3] Transactions that do not belong to a particular operating segment such as certain corporate entities are reported within “Other”.