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Shareholders' capital (Tables) | 6 Months Ended
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Jun. 30, 2023
Equity [Abstract] |
Schedule of Number of Common Shares | Number of common shares
|  | Six months ended June 30
|  | 2023 |  | 2022
Common shares, beginning of period |  | 683,614,803 |  |  | 671,960,276 |
Dividend reinvestment plan |  | 4,370,289 |  |  | 3,014,264 |
Exercise of share-based awards (b) |  | 772,591 |  |  | 673,852 |
Conversion of convertible debentures |  | 1,415 |  |  | 754 |
Common shares, end of period |  | 688,759,098 |  |  | 675,649,146 |
Schedule of Fair Value of Share Options Granted | The following assumptions were used in determining the fair value of share options granted:
|  | 2023
Risk-free interest rate |  | 3.4 | %
Expected volatility |  | 27 | %
Expected dividend yield |  | 8.6 | %
Expected life |  | 5.50 years
Weighted average grant date fair value per option |  | C$1.04

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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