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Income taxes - Reconciliation of Reported Income Taxes in the Income Statement (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Income Taxes [Abstract] |  |
Net earnings (losses) | $ 2,926 | $ 2,892
Add back income taxes | 967 | 1,044
Earnings before income taxes | $ 3,893 | $ 3,936
Applicable statutory tax rate | 26.80% | 26.80%
Income taxes computed at applicable statutory rates | $ (1,043) | $ (1,055)
Non-taxable portion of gains (losses) on investments | 4 | (1)
Uncertain tax positions | 91 | 16
Change in estimate relating to prior periods | 0 | 2
Non-taxable portion of equity losses | (18) | (26)
Previously unrecognized tax benefits | 0 | 15
Other | (1) | 5
Total income taxes | $ (967) | $ (1,044)
Average effective tax rate | 24.80% | 26.50%

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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 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The tax expense (income) divided by the accounting profit. [Refer: Accounting profit] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2022-03-24 -Paragraph 81 -Subparagraph c -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2022-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2022-03-24 + Details
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