Indebtedness - Schedule of Indebtedness (Details) - CAD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | $ 4,020,334 | $ 3,660,787 | ||||||||||
| Deferred financing costs, prepayment options, warrants and loss on repayment | (226,167) | (167,180) | ||||||||||
| Total | 3,794,167 | 3,493,607 | ||||||||||
| Less: current indebtedness | (2,742,738) | (2,341,145) | ||||||||||
| Long-term indebtedness | 1,051,429 | 1,152,462 | ||||||||||
| Term Loan B – U.S. Facility [Member] | Telesat GEO Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [1] | 1,874,625 | 1,812,296 | |||||||||
| 2027 Senior Unsecured Notes [Member] | Telesat GEO Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [2] | 302,424 | 292,369 | |||||||||
| 2026 Senior Secured Notes [Member] | Telesat GEO Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [3] | 549,452 | 531,183 | |||||||||
| 2027 Senior Secured Notes [Member] | Telesat GEO Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [4] | 319,403 | 308,783 | |||||||||
| Government Of Canada Telesat Lightspeed Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [5] | 820,976 | 603,376 | |||||||||
| Government Of Quebec Telesat Lightspeed Financing [Member] | ||||||||||||
| Telesat GEO Financing | ||||||||||||
| Borrowings before deferred financing costs | [5] | $ 153,454 | $ 112,780 | |||||||||
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