Capital Stock (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Schedule of Changes in Number of Common Shares Outstanding

The following is a schedule of changes in the number of common shares outstanding since the beginning of 2020:

	Year Ended December 31,
	2021		2020
Beginning balance		246,348,092		249,630,803
Restricted stock grants		1,293,892		3,390,358
Restricted stock units vested		1,493,341		1,226,473
Performance stock units issued		640,468		279,420
Performance stock dividends		13,966		18,700
Treasury shares		3,149		(8,197,662	)
Ending balance		249,792,908		246,348,092

Schedule of Change in Treasury Shares

The following is a schedule of the change in treasury shares since the beginning of 2020:

	Year Ended December 31,
	2021			2020
Beginning balance		10,005,795			1,808,133
Rabbi trust shares distributed and/or sold		(3,149	)		(2,338	)
Shares repurchased		—			8,200,000
Ending balance		10,002,646			10,005,795