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Income taxes - Reconciliation of Reported Income Taxes in the Income Statement (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Income Taxes [Abstract] |  |
Net earnings (losses) | $ 2,892 | $ 2,473
Add back income taxes | 1,044 | 792
Earnings from continuing operations before income taxes | $ 3,936 | $ 3,265
Applicable statutory tax rate | 26.80% | 26.90%
Income taxes computed at applicable statutory rates | $ (1,055) | $ (878)
Non-taxable portion of (losses) gains on investments | (1) | 1
Uncertain tax positions | 16 | 21
Effect of change in provincial corporate tax rate | 0 | 9
Change in estimate relating to prior periods | 2 | 6
Non-taxable portion of equity (losses) gains | (26) | 2
Previously unrecognized tax benefits | 15 | 47
Other | 5 | 0
Total income taxes from continuing operations | $ (1,044) | $ (792)
Average effective tax rate | 26.50% | 24.30%

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2021-03-24 + Details
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