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Income Taxes - Components of Income Tax Expense (Recovery) Recognized in Consolidated Statements of Income (Detail) - CAD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Current tax |  |
Current year | $ 568 | $ 1,098
Adjustments related to prior year | (193) | (263)
Current tax | 375 | 835
Deferred tax |  |
Change related to temporary differences | 489 | (1,975)
Adjustments related to prior years | (19) | 226
Effects of change in tax rates in Canada | 0 | (245)
Total deferred tax | 470 | (1,994)
Income tax expenses (recoveries) | $ 845 | $ (1,159)

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- Definition The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2023-01-01 -Paragraph 80 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2023-en-r&anchor=para_80_a&doctype=Standard -URIDate 2023-03-23 + Details
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