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Financial Instruments - Schedule of Interest Payable and Interest Payments (Details) $ in Thousands | Sep. 30, 2025 CAD ($)
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Satellite performance incentive payments [Member] |
Schedule of Interest Payable and Interest Payments [Line Items] |
Interest payable | $ 38
Interest payments | 2,476
Indebtedness [Member] |
Schedule of Interest Payable and Interest Payments [Line Items] |
Interest payable | 35,860
Interest payments | $ 1,258,233

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of interest recognised as a liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The amount of interest payments. + References No definition available. + Details
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Namespace Prefix: | tsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |