XML 209 R179.htm IDEA: XBRL DOCUMENT v3.25.0.1

Employee Future Benefits - Contributions (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 CAD ($)
Registered
Disclosure of defined benefit plans [line items]
Expected employer contributions	$ 1
Supplemental
Disclosure of defined benefit plans [line items]
Expected employer contributions	6
Other
Disclosure of defined benefit plans [line items]
Expected employer contributions	1
Total
Disclosure of defined benefit plans [line items]
Expected employer contributions	$ 8

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_DisclosureOfDefinedBenefitPlansLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 147
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_147_b&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 148
-Subparagraph d
-Clause iii
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_148_d_iii&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_EstimateOfContributionsExpectedToBePaidToPlan
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=tac_RegisteredPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=tac_SupplementalPensionPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=tac_OtherPostEmploymentBenefitPlansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=tac_RetirementPlanName1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: