XML 174 R141.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Credit Facilities, Long-Term Debt and Lease Liabilities - Amounts Outstanding (Details) $ in Millions, $ in Millions, $ in Millions | Dec. 31, 2023 CAD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 AUD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 AUD ($) | Nov. 15, 2022 CAD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 3,466 |  |  | $ 3,653 |  |  |
Less: current portion of long-term debt | (526) |  |  | (170) |  |  |
Less: current portion of lease liabilities | (6) |  |  | (8) |  |  |
Total current long-term debt and lease liabilities | (532) |  |  | (178) |  |  |
Total non-current credit facilities, long-term debt and lease liabilities | 2,934 |  |  | 3,475 |  |  |
Within one year |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Lease incentive | 12 |  |  |  |  |  |
TAPC Holdings LP bond (Poplar Creek) | Interest rate risk |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Notional amount | 86 |  |  | 95 |  |  |
Committed syndicated bank facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 0 |  |  | 32 |  |  |
Notional amount | 0 |  |  | 33 |  |  |
Term Facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 397 |  |  | 396 |  |  |
Notional amount | 400 |  |  | 400 |  |  |
7.3% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 110 |  |  | 110 |  |  |
Notional amount | 110 |  |  | 110 |  |  |
6.9% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 141 |  |  | 141 |  |  |
Notional amount | 141 |  |  | 141 |  |  |
7.8% Senior notes | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 520 |  |  | 533 |  |  |
Notional amount | 528 |  |  | 542 |  |  |
6.5% Senior notes | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 391 |  |  | 401 |  |  |
Notional amount | $ 396 |  |  | 407 |  |  |
4.5% Senior notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value |  |  |  |  |  |  | $ 400
Interest | 4.50% | 4.50% | 4.50% |  |  |  |
Melancthon Wolfe Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 168 |  |  | 202 |  |  |
Notional amount | 169 |  |  | 203 |  |  |
New Richmond Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 103 |  |  | 112 |  |  |
Notional amount | 104 |  |  | 113 |  |  |
Kent Hills Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 193 |  |  | 206 |  |  |
Notional amount | $ 196 |  |  | 209 |  |  |
Interest | 4.50% | 4.50% | 4.50% |  |  |  |
Windrise Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 164 |  |  | 170 |  |  |
Notional amount | 167 |  |  | 173 |  |  |
Pingston bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 39 |  |  | 45 |  |  |
Notional amount | 39 |  |  | 45 |  |  |
TAPC Holdings LP bond (Poplar Creek) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 85 |  |  | 94 |  |  |
Notional amount |  |  |  | 95 |  |  |
TEC Hedland PTY Ltd bond(5) | AUD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 691 |  |  | 711 |  |  |
Notional amount | 699 |  |  | 720 |  |  |
TransAlta OCP LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 217 |  |  | 241 |  |  |
Notional amount | 218 |  |  | 242 |  |  |
Big Level & Antrim | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 91 |  |  | 102 |  |  |
Notional amount | 97 | $ 73 |  | 108 | $ 79 |  |
Lakeswind | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 10 |  |  | 15 |  |  |
Notional amount | 10 | 8 |  | 15 | 11 |  |
North Carolina Solar | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 3 |  |  | 6 |  |  |
Notional amount | 3 | 2 |  | 6 | 5 |  |
Other |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 0 |  |  | 1 |  |  |
Notional amount | 0 |  |  | 1 |  |  |
Total long-term debt |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 3,323 |  |  | 3,518 |  |  |
Notional amount | 3,363 |  |  | 3,563 |  |  |
Lease liabilities |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 143 |  |  | $ 135 |  |  |
Senior notes | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Notional amount |  | $ 700 |  |  | $ 700 |  |
South Hedland Bond | AUD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value |  |  | $ 773 |  |  | $ 786 |
Weighted average | Committed syndicated bank facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 0.00% | 0.00% | 0.00% | 4.70% | 4.70% | 4.70% |
Weighted average | Term Facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 7.40% | 7.40% | 7.40% | 6.50% | 6.50% | 6.50% |
Weighted average | 7.3% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 7.30% | 7.30% | 7.30% | 7.30% | 7.30% | 7.30% |
Weighted average | 6.9% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 6.90% | 6.90% | 6.90% | 6.90% | 6.90% | 6.90% |
Weighted average | 7.8% Senior notes | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 7.80% | 7.80% | 7.80% | 7.80% | 7.80% | 7.80% |
Weighted average | 6.5% Senior notes | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% | 6.50% |
Weighted average | Melancthon Wolfe Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 3.80% | 3.80% | 3.80% | 3.80% | 3.80% | 3.80% |
Weighted average | New Richmond Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% | 4.00% |
Weighted average | Kent Hills Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest |  |  |  | 4.50% | 4.50% | 4.50% |
Weighted average | Windrise Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% | 3.40% |
Weighted average | Pingston bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 6.20% | 6.20% | 6.20% | 3.00% | 3.00% | 3.00% |
Weighted average | TAPC Holdings LP bond (Poplar Creek) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 9.40% | 9.40% | 9.40% | 8.90% | 8.90% | 8.90% |
Weighted average | TEC Hedland PTY Ltd bond(5) | AUD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 4.10% | 4.10% | 4.10% | 4.10% | 4.10% | 4.10% |
Weighted average | TransAlta OCP LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% | 4.50% |
Weighted average | Big Level & Antrim | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 6.60% | 6.60% | 6.60% | 6.60% | 6.60% | 6.60% |
Weighted average | Lakeswind | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 10.50% | 10.50% | 10.50% | 10.50% | 10.50% | 10.50% |
Weighted average | North Carolina Solar | USD |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 7.30% | 7.30% | 7.30% | 7.30% | 7.30% | 7.30% |
Weighted average | Other |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest | 0.00% | 0.00% | 0.00% | 5.90% | 5.90% | 5.90% |
Borrowings effective interest rate | 598.00% | 598.00% | 598.00% |  |  |  |

X
- Definition The amount of outstanding funds that the entity is obligated to repay. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_Borrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of current borrowings and current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentBorrowingsAndCurrentPortionOfNoncurrentBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_CurrentLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the lease commitments for short-term leases accounted for applying paragraph 6 of IFRS 16. Short-term lease is a lease that, at the commencement date, has a lease term of 12 months or less. A lease that contains a purchase option is not a short-term lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_LeaseCommitmentsForShorttermLeasesForWhichRecognitionExemptionHasBeenUsed
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + 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_NotionalAmount
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ShorttermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Borrowings Effective Interest Rate + References No definition available. + Details
Name: | tac_BorrowingsEffectiveInterestRate
Namespace Prefix: | tac_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Details
Name: | ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_LineOfCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_TermFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_UnsecuredDebt1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_A69MediumTermNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_A78SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tac_PortionDenominatedInForeignCurrencyAxis=currency_USD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_A65SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_A45SeniorNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseMelancthonWolfeBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseNewRichmondBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseKentHillsBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseWindriseWindLPBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecoursePingstonBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecoursePoplarCreekMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_TECHedlandPTYLtdBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | tac_PortionDenominatedInForeignCurrencyAxis=currency_AUD
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseOCPBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_TaxEquityFinancingBigLevelAndAntrimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_TaxEquityFinancingLakeswindMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_TaxEquityFinancingNorthCarolinaSolarMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_OtherBorrowingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_AllBorrowingsExceptFinanceLeaseObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_FinanceLeaseObligationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_SeniorNotes1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_NonRecourseSouthHedlandBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_WeightedAverageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |