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Shareholders' capital (Tables)

6 Months Ended

Jun. 30, 2022

Equity [Abstract]

Schedule of Number of Common Shares

Number of common shares 

						Six months ended June 30
						2022						2021
Common shares, beginning of period						671,960,276						597,142,219
Public offering						—						16,789,922
Dividend reinvestment plan						3,014,264						2,926,494
Exercise of share-based awards (b)						673,852						679,834
Conversion of convertible debentures						754						1,886
Common shares, end of period						675,649,146						617,540,355

Schedule of Fair Value of Share Options Granted

The following assumptions were used in determining the fair value of share options granted: 

						2022
Risk-free interest rate						1.9		%
Expected volatility						23		%
Expected dividend yield						4.3		%
Expected life						5.50 years
Weighted average grant date fair value per option						C$	2.44

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Tabular disclosure of the change in common stock outstanding.

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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