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Income Taxes - Summary of Loss Carryforwards and Deductible Temporary Differences (Details) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Deductible temporary differences | $ 0.1 | $ 0.2
Non-capital tax losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Non-capital and capital tax losses | 71.5 | 113.8
Non-capital tax losses | Expire (2023 to 2042) |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Non-capital and capital tax losses | 29.7 | 72.0
Non-capital tax losses | Never expire |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Non-capital and capital tax losses | 41.8 | 41.8
Capital tax losses | Never expire |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Non-capital and capital tax losses | 7.8 | 2.5
Non-capital and capital tax losses |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Non-capital and capital tax losses | $ 79.4 | $ 116.5

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- Definition The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_e&doctype=Standard -URIDate 2022-03-24 + Details
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