XML 142 R107.htm IDEA: XBRL DOCUMENT
v3.22.4

Non-Controlling Interests - Subsidiaries and Operations with Non-Controlling Interests (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
TransAlta Cogeneration, L.P. |  |
Disclosure of subsidiaries [line items] |  |
Ownership interests | 49.99% | 49.99%
TransAlta Cogeneration, L.P. | TransAlta Cogeneration, L.P. |  |
Disclosure of subsidiaries [line items] |  |
Ownership interests | 49.99% |
TransAlta Renewables Inc. |  |
Disclosure of subsidiaries [line items] |  |
Ownership interests | 39.90% | 39.90%
Kent Hills wind farm | TransAlta Renewables Inc. |  |
Disclosure of subsidiaries [line items] |  |
Ownership interests | 17.00% |

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

X
- Definition The proportion of ownership interests in a subsidiary held by non-controlling interests. [Refer: Subsidiaries [member]; Non-controlling interests] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph 12 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_12_c&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
Namespace Prefix: | ifrs-full_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tac_TransAltaCogenerationL.P.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=tac_TransAltaCogenerationL.P.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tac_TransAltaRenewablesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=tac_KentHillsWindFarmMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=tac_TransAltaRenewablesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |