XML 118 R83.htm IDEA: XBRL DOCUMENT
v3.22.4

Commitments and Contingencies (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Disclosure of other provisions, contingent liabilities and contingent assets [Abstract] |
Disclosure of commitments and future payments | In addition to commitments disclosed elsewhere in the financial statements, the Company has incurred the following additional contractual commitments, either directly or through its interests in joint operations. Approximate future payments under these agreements are as follows:
| 2023 | 2024 | 2025 | 2026 | 2027 | 2028 and thereafter | Total
Natural gas, transportation and other contracts | 56 |  | 47 |  | 45 |  | 45 |  | 46 |  | 457 |  | 696 |
Transmission | 10 |  | 7 |  | 7 |  | 3 |  | 1 |  | 39 |  | 67 |
Coal supply agreements | 83 |  | 87 |  | 71 |  | — |  | — |  | — |  | 241 |
Long-term service agreements | 51 |  | 49 |  | 35 |  | 32 |  | 21 |  | 140 |  | 328 |
Operating leases | 3 |  | 3 |  | 3 |  | 2 |  | 2 |  | 29 |  | 42 |
Growth | 446 |  | — |  | — |  | — |  | — |  | — |  | 446 |
TransAlta Energy Transition Bill | 6 |  | — |  | — |  | — |  | — |  | — |  | 6 |
Total | 655 |  | 193 |  | 161 |  | 82 |  | 70 |  | 665 |  | 1,826 |

X
- Definition Disclosure of Commitments By Commitment [Table Text Block] + References No definition available. + Details
Name: | tac_DisclosureofCommitmentsByCommitmentTableTextBlock
Namespace Prefix: | tac_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of other provisions, contingent liabilities and contingent assets [Abstract] + References No definition available. + Details
Name: | tac_DisclosureofotherprovisionscontingentliabilitiesandcontingentassetsAbstract
Namespace Prefix: | tac_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration