XML 124 R91.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Net Other Operating (Income) Loss - Disclosure of Components of Net Other Operating (Income) Expense (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Analysis of income and expense [abstract] |  |  |
Alberta Off-Coal Agreement | $ (40) | $ (40) | $ (40)
Liquidated damages recoverable | (6) | (12) | 0
Insurance recoveries | (1) | (7) | 0
Supplier, other contract settlements and other | 0 | 1 | 34
Onerous contract provisions | 0 | 0 | 14
Net other operating (income) loss | $ (47) | $ (58) | $ 8

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

X
- Definition The amount of income recognised from the reimbursement of a claim as a result of the occurrence of an insured event covered by an insurance contract. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_IncomeFromReimbursementsUnderInsurancePolicies
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of operating income (expense) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_OtherOperatingIncomeExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (loss) on energy supply agreement + References No definition available. + Details
Name: | tac_GainLossOnEnergySupplyAgreement
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gains (Losses) on Contract Agreement + References No definition available. + Details
Name: | tac_GainsLossesonContractAgreement
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Liquidated Damages Recoverable + References No definition available. + Details
Name: | tac_LiquidatedDamagesRecoverable
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Supplier Settlement + References No definition available. + Details
Name: | tac_SupplierSettlement
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration