XML 141 R108.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Financial Instruments - Carrying Amounts and Classifications of Financial Assets and Liabilities (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | $ 3,466 | $ 3,653
Cash equivalents | 0 | 0
Bank overdraft |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3 | 16
Bank overdraft | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3 | 16
Accounts payable and accrued liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 797 | 1,346
Accounts payable and accrued liabilities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 797 | 1,346
Dividends payable (common and preferred) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 49 | 68
Dividends payable (common and preferred) | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 49 | 68
Credit facilities, long-term debt and lease liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3,466 | 3,653
Credit facilities, long-term debt and lease liabilities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 3,466 | 3,653
Exchangeable securities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 744 | 739
Exchangeable securities | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 744 | 739
Within one year | Risk Management Liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 314 | 1,129
Within one year | Derivatives | Risk Management Liabilities | Derivatives used for hedging |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 125 | 271
Within one year | Derivatives | Risk Management Liabilities | Derivatives held for trading (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 189 | 858
Later than one year | Risk Management Liabilities |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 274 | 333
Later than one year | Derivatives | Risk Management Liabilities | Derivatives used for hedging |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 80 | 76
Later than one year | Derivatives | Risk Management Liabilities | Derivatives held for trading (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial liabilities | 194 | 257
Cash and cash equivalents |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 348 | 1,134
Cash and cash equivalents | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 348 | 1,134
Restricted cash |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 69 | 70
Restricted cash | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 69 | 70
Trade and other receivables |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 807 | 1,589
Trade and other receivables | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 807 | 1,589
Long-term portion of finance lease receivables |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 171 | 129
Long-term portion of finance lease receivables | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 171 | 129
Long-term portion of loan receivable |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 25 | 33
Long-term portion of loan receivable | Amortized cost |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 25 | 33
Other investments(3) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 16 | 12
Other investments(3) | Other financial assets (FVTPL) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 15 | 11
Other investments(3) | Other financial assets (FVOCI) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1 | 1
Risk management assets | Within one year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 151 | 709
Risk management assets | Later than one year |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 52 | 161
Risk management assets | Derivatives used for hedging | Within one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Risk management assets | Derivatives used for hedging | Later than one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Risk management assets | Derivatives held for trading (FVTPL) | Within one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 151 | 709
Risk management assets | Derivatives held for trading (FVTPL) | Later than one year | Derivatives |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 52 | $ 161

X
- Definition The amount of short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CashEquivalents
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35H&doctype=Standard -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35M&doctype=Standard -URIDate 2023-03-23 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35N&doctype=Standard -URIDate 2023-03-23 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_35I&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_FinancialAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_25&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_FinancialLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_BankOverdraftMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=ifrs-full_FinancialLiabilitiesAtAmortisedCostCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_AccountsPayableAndAccruedLiabilities1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_DividendsPayable1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_CreditFacilitiesLongtermDebtAndFinanceLeaseObligations1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_ExchangeableSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialLiabilitiesAxis=tac_RiskManagementLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_DerivativesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=tac_HedgingLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialLiabilitiesAxis=ifrs-full_TradingSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tac_CashAndCashEquivalents1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtAmortisedCostCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tac_RestrictedCashMember
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_ClassesOfFinancialAssetsAxis=tac_LongtermPortionOfFinanceLeaseReceivablesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tac_LongTermPortionOfLoanReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tac_OtherInvestments1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialAssetsAxis=tac_RiskManagementAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=tac_HedgingAssetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfFinancialAssetsAxis=ifrs-full_TradingSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |