XML 166 R136.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Inventory Change in Inventory (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Inventories at the beginning of the period | $ 238 | $ 251
Net additions (use) | 22 | 26
Write-downs | 28 | 0
Change in foreign exchange rates | 0 | (2)
Inventories at the end of the period | 167 | 238
Coal |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |
Write-downs | $ 65 | $ 37

X
- Definition The amount of current inventories. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2021-01-01 -Paragraph 36 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2021-en-r&anchor=para_36_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_g&doctype=Standard -URIDate 2021-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 68 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_68&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_Inventories
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount recognised resulting from the write-down of inventories to net realisable value or reversals of those write-downs. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_98_a&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_WritedownsReversalsOfInventories
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | srt_ConsolidatedOilAndGasProductionAbstract
Namespace Prefix: | srt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Additions Other Than Through Business Combinations, Inventory + References No definition available. + Details
Name: | tac_AdditionsOtherThanThroughBusinessCombinationsInventory
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) Through Net Exchange Differences, Inventory + References No definition available. + Details
Name: | tac_IncreaseDecreaseThroughNetExchangeDifferencesInventory
Namespace Prefix: | tac_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_EnergyAxis=tac_CoalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |