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Income taxes - Significant Components of Income Taxes Deducted from Net Earnings (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Current taxes |  |
Current taxes | $ (878) | $ (872)
Uncertain tax positions | 91 | 12
Change in estimate relating to prior periods | 8 | 42
Deferred taxes |  |
Deferred taxes relating to the origination and reversal of temporary differences | (176) | (184)
Change in estimate relating to prior periods | (8) | (40)
Recognition and utilization of loss carryforwards | (4) | (21)
Previously unrecognized tax benefits | 0 | 15
Uncertain tax positions | 0 | 4
Total income taxes | $ (967) | $ (1,044)

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