XML 156 R126.htm IDEA: XBRL DOCUMENT v3.25.0.1

Risk Management Activities - Maximum Exposure to Credit Risk (Details) - CAD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure of credit risk exposure [line items]
Maximum credit exposure	$ 77	$ 23
Credit risk
Disclosure of credit risk exposure [line items]
Maximum credit exposure	1,508
Credit risk | Trade and other receivables(2)
Disclosure of credit risk exposure [line items]
Maximum credit exposure	$ 767
Trade and other receivables(2) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%
Trade and other receivables(2) | Investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	87.00%
Trade and other receivables(2) | Non-investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	13.00%
Long-term portion of finance lease receivables | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%
Maximum credit exposure	$ 305
Long-term portion of finance lease receivables | Investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%
Long-term portion of finance lease receivables | Non-investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	0.00%
Risk management assets | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%
Maximum credit exposure	$ 411
Risk management assets | Investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	58.00%
Risk management assets | Non-investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	42.00%
Loan receivable | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%
Maximum credit exposure	$ 25
Receivable with no external credit rating	$ 25
Loan receivable | Investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	0.00%
Loan receivable | Non-investment grade (per cent) | Credit risk
Disclosure of credit risk exposure [line items]
Credit risk, allocation percentage	100.00%

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

X

- Definition

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35K
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35K_a&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_MaximumExposureToCreditRisk
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Credit Risk, Allocation Percentage

+ References

No definition available.

+ Details

Name:	tac_CreditRiskAllocationPercentage
Namespace Prefix:	tac_
Data Type:	dtr-types1:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Loan Receivable, No External Credit Rating

+ References

No definition available.

+ Details

Name:	tac_LoanReceivableNoExternalCreditRating
Namespace Prefix:	tac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CreditRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=tac_TradeAndOtherReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=tac_TradeAndOtherReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tac_InvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ExternalCreditGradesAxis=tac_NonInvestmentGradeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=tac_LongtermPortionOfFinanceLeaseReceivablesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=tac_RiskManagementAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_LoansAndReceivablesCategoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: