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Share-Based Compensation Plans (Details) - Schedule of share-based compensation expense included in the consolidated statements of income - CAD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Schedule of share-based compensation expense included in the consolidated statements of income [Abstract] |  |  |
Operating expenses | $ 73,723 | $ 12,500 | $ 16,035

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Namespace Prefix: | tsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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Namespace Prefix: | tsat_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration