XML 179 R149.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Credit Facilities, Long-Term Debt and Lease Liabilities - Amounts Outstanding (Details) $ in Millions, $ in Millions, $ in Millions | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2021 AUD ($) | Dec. 06, 2021 | Dec. 31, 2020 CAD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 AUD ($)
--- | --- | --- | --- | --- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 3,267 |  |  |  | $ 3,361 |  |
Less: current portion of long-term debt | (837) |  |  |  | (97) |  |
Less: current portion of lease liabilities | (7) |  |  |  | (8) |  |
Total current long-term debt and lease liabilities | (844) |  |  |  | (105) |  |
Credit facilities, long-term debt, and finance lease obligations | 2,423 |  |  |  | 3,256 |  |
All Borrowings Except Finance Lease Obligations |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 3,167 |  |  |  | 3,227 |  |
Notional amount | 3,198 |  |  |  | 3,264 |  |
Credit facilities |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 0 |  |  |  | 114 |  |
Notional amount |  |  |  |  | 114 |  |
7.3% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 110 |  |  |  | 109 |  |
Notional amount | 110 |  |  |  | 110 |  |
6.9% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 141 |  |  |  | 140 |  |
Notional amount | 141 |  |  |  | 141 |  |
Senior notes | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Notional amount |  | $ 700 |  |  |  | $ 700 |
6.5% Senior notes | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 378 |  |  |  | 380 |  |
Notional amount | 383 |  |  |  | 383 |  |
0.045 | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 510 |  |  |  | 506 |  |
Notional amount | 511 |  |  |  | 511 |  |
Melancthon Wolfe Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 235 |  |  |  | 268 |  |
Notional amount | 237 |  |  |  | 270 |  |
New Richmond Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 120 |  |  |  | 127 |  |
Notional amount | 121 |  |  |  | 128 |  |
Kent Hills Wind LP bond(4) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 221 |  |  |  | 230 |  |
Notional amount | 221 |  |  |  | 233 |  |
Windrise Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 171 |  |  |  | 0 |  |
Notional amount | 173 |  |  |  | 0 |  |
Interest rate |  |  |  | 3.41% |  |  |
Pingston bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 45 |  |  |  | 45 |  |
Notional amount | 45 |  |  |  | 45 |  |
TAPC Holdings LP bond (Poplar Creek) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 102 |  |  |  | 111 |  |
Notional amount | 104 |  |  |  | 113 |  |
TEC Hedland PTY Ltd bond | Australia, Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 732 |  |  |  | 772 |  |
Notional amount | 742 |  |  |  | 782 |  |
South Hedland Bond | Australia, Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value |  |  | $ 800 |  |  |  | $ 800
TransAlta OCP LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 263 |  |  |  | 284 |  |
Notional amount | 265 |  |  |  | 287 |  |
Big Level & Antrim | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 106 |  |  |  | 112 |  |
Notional amount | 112 | 88 |  |  | 119 | 94 |
Lakeswind | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 18 |  |  |  | 22 |  |
Notional amount | 18 | 14 |  |  | 22 | 16 |
North Carolina Solar | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 11 |  |  |  | 0 |  |
Notional amount | 11 | $ 9 |  |  | 0 | $ 0 |
Other |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | 4 |  |  |  | 7 |  |
Notional amount | 4 |  |  |  | 6 |  |
Finance lease obligation |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Carrying value | $ 100 |  |  |  | $ 134 |  |
Weighted average | Credit facilities |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate |  |  |  |  | 2.70% | 2.70% | 2.70%
Weighted average | 7.3% Medium term notes |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 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 rate | 6.90% | 6.90% | 6.90% |  | 6.90% | 6.90% | 6.90%
Weighted average | 6.5% Senior notes | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 6.50% | 6.50% | 6.50% |  | 6.50% | 6.50% | 6.50%
Weighted average | 0.045 | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 4.50% | 4.50% | 4.50% |  | 4.50% | 4.50% | 4.50%
Weighted average | Melancthon Wolfe Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 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 rate | 4.00% | 4.00% | 4.00% |  | 4.00% | 4.00% | 4.00%
Weighted average | Kent Hills Wind LP bond(4) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 4.50% | 4.50% | 4.50% |  | 4.50% | 4.50% | 4.50%
Weighted average | Windrise Wind LP bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 3.40% | 3.40% | 3.40% |  | 0.00% | 0.00% | 0.00%
Weighted average | Pingston bond |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 3.00% | 3.00% | 3.00% |  | 3.00% | 3.00% | 3.00%
Weighted average | TAPC Holdings LP bond (Poplar Creek) |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 4.40% | 4.40% | 4.40% |  | 4.50% | 4.50% | 4.50%
Weighted average | TEC Hedland PTY Ltd bond | Australia, Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 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 rate | 4.50% | 4.50% | 4.50% |  | 4.50% | 4.50% | 4.50%
Weighted average | Big Level & Antrim | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 6.60% | 6.60% | 6.60% |  | 6.60% | 6.60% | 6.60%
Weighted average | Lakeswind | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 10.50% | 10.50% | 10.50% |  | 10.50% | 10.50% | 10.50%
Weighted average | North Carolina Solar | U.S. Dollars |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 7.30% | 7.30% | 7.30% |  | 0.00% | 0.00% | 0.00%
Weighted average | Other |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest rate | 5.90% | 5.90% | 5.90% |  | 5.90% | 5.90% | 5.90%

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 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_7&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num: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 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard -URIDate 2021-03-24 + 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 non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + 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 2021-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_55&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ShorttermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=tac_AllBorrowingsExceptFinanceLeaseObligationsMember
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_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_SeniorNotes1Member
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_NonRecourseSouthHedlandBondMember
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_FinanceLeaseObligationMember
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: |