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Capital Stock - Schedule of Changes in Number of Common Shares Outstanding (Detail) - shares
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Class Of Stock [Line Items]    
Beginning balance 241,040,304 238,885,730
Treasury shares (2,050,000) (714,530)
Ending balance 240,669,354 241,040,304
Restricted Stock    
Class Of Stock [Line Items]    
Restricted stock grants 24,186 50,238
Restricted stock units vested 1,192,633 1,755,345
Performance Share    
Class Of Stock [Line Items]    
Performance stock units vested 455,317 1,057,245
Performance stock dividends 6,914 6,276