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Earnings per share | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Earnings per share | Earnings per share
| Year Ended December 31
(in millions of U.S. dollars, except share and per share data) | 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net income | $ | 8,539 |  |  | $ | 3,533 |  |  | $ | 4,454 |
Denominator: |  |  |  |  |
Denominator for basic earnings per share: |  |  |  |  |
Weighted-average shares outstanding | 439,968,422 |  |  | 451,602,820 |  |  | 455,910,463 |
Denominator for diluted earnings per share: |  |  |  |  |
Share-based compensation plans | 3,228,856 |  |  | 1,838,692 |  |  | 3,004,200 |
Weighted-average shares outstanding and assumed conversions | 443,197,278 |  |  | 453,441,512 |  |  | 458,914,663 |
Basic earnings per share | $ | 19.41 |  |  | $ | 7.82 |  |  | $ | 9.77 |
Diluted earnings per share | $ | 19.27 |  |  | $ | 7.79 |  |  | $ | 9.71 |
Potential anti-dilutive share conversions | 1,532,066 |  |  | 6,811,966 |  |  | 2,410,337 |
Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective years. These securities consisted of stock options in which the underlying exercise prices were greater than the average market prices of our Common Shares. Refer to Note 12 for additional information on stock options.

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