XML 199 R166.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Share-Based Payment Plans - Narrative (Details) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 CAD ($) shares $ / shares | Dec. 31, 2022 CAD ($) $ / shares | Dec. 31, 2021 CAD ($) $ / shares
Executive officers |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted (in shares) | 0.4 | 0.3 | 0.7
Weighted average exercise price (in CAD per share) | $ / shares | $ 12.02 | $ 12.66 | $ 9.86
PSUs and RSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Performance period | 3 years |  |
Vesting period | 3 years |  |
Compensation expense (reversal) | $ 21.0 | $ 20.0 | $ 14.0
PSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Performance period | 3 years |  |
DSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Compensation expense (reversal) | $ 1.0 | 0.0 | 3.0
Stock Options | Executive officers |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Vesting period | 3 years |  |
Compensation expense (reversal) | $ 1.0 | $ 1.0 | $ 2.0
Expiration period of shares granted | 7 years |  |

X
- 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
Name: | ifrs-full_DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions] + 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_ExpenseFromSharebasedPaymentTransactionsWithEmployees
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average exercise price of share options granted in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2023-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2023-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement2019
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Award Requisite Service Period2 + References No definition available. + Details
Name: | tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod2
Namespace Prefix: | tac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-Based Compensation Arrangement By Share-Based Payment Award, Award Vesting Period2 + References No definition available. + Details
Name: | tac_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod2
Namespace Prefix: | tac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share-based Compensation Arrangement By Share-based Payment Award, Expiration Period1 + References No definition available. + Details
Name: | tac_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod1
Namespace Prefix: | tac_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | tac_TitleofIndividuals1Axis=tac_ExecutiveOfficer1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tac_PerformanceShareUnitPSUandRestrictedShareUnitRSUPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tac_PerformanceShareUnitPSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tac_DeferredShareUnitDSUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tac_StockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |