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Per Share Amounts - Schedule Representing Per Share Amounts (Detail) - CAD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Earnings per share [line items] |  |  |  |  |  |
Net Earnings (Loss) | $ 2,432 | $ 224 | [1] | $ 4,057 | $ 444 | [1]
Effect of Cumulative Dividends on Preferred Shares | (8) | (8) |  | (17) | (17) |
Net Earnings (Loss) – Basic and Diluted | $ 2,424 | $ 216 |  | $ 4,040 | $ 427 |
Basic – Weighted Average Number of Shares (in shares) | 1,971.3 | 2,017.5 |  | 1,980.6 | 2,017.5 |
Dilutive Effect of Warrants (in shares) | 47.5 | 24.3 |  | 46.2 | 21.1 |
Dilutive Effect of Net Settlement Rights (in shares) | 10.6 | 0.3 |  | 11.9 | 0.0 |
Diluted – Weighted Average Number of Shares (in shares) | 2,029.4 | 2,042.1 |  | 2,038.7 | 2,038.6 |
Net Earnings (Loss) Per Share — Basic (CAD per share) | $ 1.23 | $ 0.11 | [1] | $ 2.04 | $ 0.21 | [1]
Net Earnings (Loss) Per Share — Diluted (CAD per share) | $ 1.19 | $ 0.11 | [1] | $ 1.98 | $ 0.21 | [1]
Common shares |  |  |  |  |  |
Earnings per share [line items] |  |  |  |  |  |
Instruments excluded from calculation | $ 24 | $ 6 |  | $ 41 | $ 12 |
Instruments excluded from calculation, shares (in shares) | 2.0 | 1.9 |  | 1.8 | 1.8 |
[1] | See Note 3 for revisions to prior period results.

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