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Per Share Amounts - Schedule Representing Per Share Amounts (Detail) - CAD ($) $ / shares in Units, shares in Thousands, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Earnings per share [abstract] |  |
Net Earnings (Loss) | $ 4,109 | $ 6,450
Effect of Cumulative Dividends on Preferred Shares | (36) | (35)
Net Earnings (Loss) – Basic and Diluted | $ 4,073 | $ 6,415
Basic – Weighted Average Number of Shares (in shares) | 1,895,487 | 1,951,262
Dilutive Effect of Warrants (in shares) | 22,223 | 44,845
Dilutive Effect of Net Settlement Rights (in shares) | 7,150 | 10,045
Diluted Effect of Cenovus Replacement Stock Options (in shares) | 580 | 0
Diluted - Weighted Average Number of Shares (in shares) | 1,925,440 | 2,006,152
Net Earnings (Loss) Per Share — Basic (CAD per share) | $ 2.15 | $ 3.29
Net Earnings (Loss) Per Share — Diluted (CAD per share) | $ 2.12 | $ 3.20

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