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v3.19.3.a.u2

Corporate Information Corporate Information (Details) | Dec. 31, 2019 segment
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Disclosure of operating segments [line items] |
Number of segments | 8
Generation Segments [Member] |
Disclosure of operating segments [line items] |
Number of segments | 6

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain 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 Number Of Reportable Segments + References No definition available. + Details
Name: | tac_NumberOfReportableSegments1
Namespace Prefix: | tac_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | ifrs-full_SegmentsAxis=tac_GenerationSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |