Capital Stock - Schedule of Changes in Number of Common Shares Outstanding (Detail) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Class Of Stock [Line Items]
Beginning balance	241,040,304	238,885,730
Treasury shares	(1,400,000)	(714,530)
Ending balance	241,307,844	241,040,304
Restricted Stock
Class Of Stock [Line Items]
Restricted stock grants	15,609	50,238
Restricted stock units vested	1,189,700	1,755,345
Performance Share
Class Of Stock [Line Items]
Performance stock units issued	455,317	1,057,245
Performance stock dividends	6,914	6,276