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Per Share Amounts - Schedule Representing Per Share Amounts (Detail) - CAD ($) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Earnings per share [abstract] |  |  |  |  |
Net Earnings (Loss) | $ 6,450 | $ 587 | [1] | $ (2,379) | [1]
Effect of Cumulative Dividends on Preferred Shares | (35) | (34) |  | 0 |
Net Earnings (Loss) – Basic and Diluted | $ 6,415 | $ 553 |  | $ (2,379) |
Basic – Weighted Average Number of Shares (in shares) | 1,951.3 | 2,016.2 |  | 1,228.9 |
Dilutive Effect of Warrants (in shares) | 44.8 | 27.6 |  | 0.0 |
Dilutive Effect of Net Settlement Rights (in shares) | 10.0 | 1.3 |  | 0.0 |
Diluted - Weighted Average Number of Shares (in shares) | 2,006.1 | 2,045.1 |  | 1,228.9 |
Net Earnings (Loss) Per Share — Basic (CAD per share) | $ 3.29 | $ 0.27 | [1] | $ (1.94) | [1]
Net Earnings (Loss) Per Share — Diluted (CAD per share) | $ 3.20 | $ 0.27 | [1] | $ (1.94) | [1]
[1] | See Note 3X for revisions to prior period results.

X
- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_70_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition Adjustment to profit (loss) for non-participating preference share dividends to calculate profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Preference shares [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Section Example 12 Calculation and presentation of basic and diluted earnings per share (comprehensive example) -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&doctype=Illustrative%20Examples&dita_xref=IAS33_ex12__IAS33_ex12_TI -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 70 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_70_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_66&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_67&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_66&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_67&doctype=Standard -URIDate 2022-03-24 + Details
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X
- Definition The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_70_b&doctype=Standard -URIDate 2022-03-24 + Details
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