XML 169 R146.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Share-Based Compensation Plans (Details) - Schedule of number of restricted share units outstanding - shares | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Telesat Canada [Member] |  |
Share-Based Compensation Plans (Details) - Schedule of number of restricted share units outstanding [Line Items] |  |
RSUs with time criteria outstanding at beginning | 66,667 | 133,333
RSUs with time and performance criteria outstanding at beginning |  |
RSUs with time criteria granted | 3,230,000 |
RSUs with time and performance criteria granted | 300,000 |
RSUs with time criteria exchange upon close of Transaction | (3,296,667) |
RSUs with time and performance criteria exchange upon close of Transaction | (300,000) |
RSUs with time criteria outstanding at ending |  | 66,667
RSUs with time and performance criteria at ending |  |
RSUs with time criteria settled |  | (66,666)
RSUs with time and performance criteria settled |  |
Telesat Corporation [Member] |  |
Share-Based Compensation Plans (Details) - Schedule of number of restricted share units outstanding [Line Items] |  |
RSUs with time criteria exchange upon close of Transaction | 1,363,501 |
RSUs with time and performance criteria exchange upon close of Transaction | 124,080 |
RSUs with time criteria outstanding at ending | 1,363,501 |
RSUs with time and performance criteria at ending | 124,080 |

X
- References No definition available. + Details
Name: | tsat_RSUsWithTimeAndPerformanceCriteriaExchangeUponCloseOfTransaction
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_RSUsWithTimeCriteriaExchangeUponCloseOfTransactioninDollars
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_RestrictedShareUnitsWithTimeAndPerformanceCriteriaGranted
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_RestrictedShareUnitsWithTimeAndPerformanceCriteriaOutstanding
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | tsat_RestrictedShareUnitsWithTimeAndPerformanceCriteriaSettled
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_RestrictedShareUnitsWithTimeCriteriaOutstanding
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | tsat_RestrictedShareUnitsWithTimeCriteriaSettled
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_RestrictedSharesUnitsWithTimeCriteriaGranted
Namespace Prefix: | tsat_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | tsat_ShareBasedCompensationPlansDetailsScheduleofnumberofrestrictedshareunitsoutstandingLineItems
Namespace Prefix: | tsat_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tsat_TelesatCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tsat_TelesatCorpMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |