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Share Capital (Tables) | 12 Months Ended
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Dec. 31, 2023
Share Capital, Reserves And Other Equity Interest [Abstract] |
Summary of Outstanding Common Stock |
|  | 2023 |  | 2022
ISSUED COMMON SHARES |  | Number of shares (thousands) |  | Amount |  | Number of shares (thousands) |  | Amount
Balance – beginning of year |  | 1,102,636 |  |  | $ | 10,294 |  |  | 1,168,369 |  |  | $ | 10,168 |
Issued upon exercise of stock options |  | 9,822 |  |  | 372 |  |  | 11,605 |  |  | 442 |
Previously recognized liability on stock options exercised for common shares |  | — |  |  | 435 |  |  | — |  |  | 387 |
Purchase of common shares under Normal Course Issuer Bid |  | (40,050) |  |  | (389) |  |  | (77,338) |  |  | (703) |
Balance – end of year |  | 1,072,408 |  |  | $ | 10,712 |  |  | 1,102,636 |  |  | $ | 10,294 |
Summary of Stock Option Activity | The following table summarizes information relating to stock options outstanding at December 31, 2023 and 2022:
|  | 2023 |  | 2022
|  | Stock options (thousands) |  | Weighted average exercise price |  | Stock options (thousands) |  | Weighted average exercise price
Outstanding – beginning of year |  | 31,150 |  |  | $ | 42.37 |  |  | 38,327 |  |  | $ | 35.88 |
Granted |  | 7,024 |  |  | $ | 80.17 |  |  | 7,547 |  |  | $ | 68.15 |
Exercised for common shares |  | (9,822) |  |  | $ | 37.84 |  |  | (11,605) |  |  | $ | 38.06 |
Surrendered for cash settlement |  | (218) |  |  | $ | 38.77 |  |  | (441) |  |  | $ | 38.43 |
Forfeited |  | (1,929) |  |  | $ | 50.86 |  |  | (2,678) |  |  | $ | 41.43 |
Outstanding – end of year |  | 26,205 |  |  | $ | 53.60 |  |  | 31,150 |  |  | $ | 42.37 |
Exercisable – end of year |  | 3,672 |  |  | $ | 42.14 |  |  | 5,522 |  |  | $ | 37.60 |
Summary of Range of Exercise Prices of Stock Options Outstanding | The range of exercise prices of stock options outstanding and exercisable at December 31, 2023 was as follows:
|  |  |  | Stock options outstanding |  | Stock options exercisable
Range of exercise prices | Stock options outstanding (thousands) |  | Weighted average remaining term (years) |  | Weighted average exercise price |  | Stock options exercisable (thousands) |  | Weighted average exercise price
$20.76 | – | $29.99 |  |  | 5,441 |  |  | 2.01 |  | $ | 27.42 |  |  | 969 |  |  | $ | 24.84 |
$30.00 | – | $39.99 |  |  | 5,411 |  |  | 1.03 |  | $ | 36.67 |  |  | 1,227 |  |  | $ | 36.56 |
$40.00 | – | $49.99 |  |  | 2,381 |  |  | 2.41 |  | $ | 40.52 |  |  | 630 |  |  | $ | 40.50 |
$50.00 | – | $59.99 |  |  | 433 |  |  | 3.86 |  | $ | 54.24 |  |  | 30 |  |  | $ | 54.24 |
$60.00 | – | $69.99 |  |  | 3,837 |  |  | 3.49 |  | $ | 64.90 |  |  | 301 |  |  | $ | 64.21 |
$70.00 | – | $79.99 |  |  | 7,787 |  |  | 4.18 |  | $ | 78.48 |  |  | 515 |  |  | $ | 76.35 |
$80.00 | – | $86.06 |  |  | 915 |  |  | 5.72 |  | $ | 84.12 |  |  | — |  |  | $ | — |
|  |  |  | 26,205 |  |  | 2.87 |  | $ | 53.60 |  |  | 3,672 |  |  | $ | 42.14 |

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