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Income Taxes - Rate Reconciliations (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes [Abstract] |  |  |
Earnings (loss) before income taxes | $ (380) | $ (303) | $ 193
Net earnings (loss) attributable to non-controlling interests not subject to tax | (33) | 2 | (26)
Adjusted earnings (loss) before income taxes | $ (413) | $ (301) | $ 167
Statutory Canadian federal and provincial income tax rate | 23.60% | 24.50% | 26.50%
Expected income tax expense (recovery) | $ (98) | $ (74) | $ 44
Increase (decrease) in income taxes resulting from: |  |  |
Differences in effective foreign tax rates | 4 | 3 | 5
Deferred income tax expense related to temporary difference on investment in subsidiaries | 0 | 9 | 0
Write-down (reversal of write-down) of unrecognized deferred income tax assets | 134 | 8 | (9)
Statutory and other rate differences | 4 | (7) | (31)
Other | 1 | 11 | 8
Income tax expense (recovery) | $ 45 | $ (50) | $ 17
Effective tax rate | (11.00%) | 17.00% | 10.00%

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- Definition The amount of deferred tax expense arising from the write-down, or reversal of a previous write-down, of a deferred tax asset. [Refer: Deferred tax assets] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 80 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_80_g&doctype=Standard -URIDate 2021-03-24 + Details
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