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Income Taxes - Contingencies (Details) - CAD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Maximum |  |
Disclosure of contingent liabilities [line items] |  |
Tax expense, reassessed tax liability | $ 57 |
Minimum |  |
Disclosure of contingent liabilities [line items] |  |
Tax expense, reassessed tax liability | 0 |
Uncertain tax positions |  |
Disclosure of contingent liabilities [line items] |  |
Provision for uncertain tax positions | $ 0 | $ 0

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- Definition The amount of liabilities of uncertain timing or amount, including provisions for employee benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_54_l&doctype=Standard -URIDate 2021-03-24 + Details
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- Details
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