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Earnings per Share and Dividends per Share - Additional Information (Detail) - $ / shares
6 Months Ended
Mar. 06, 2023
Mar. 31, 2023
Mar. 31, 2022
Weighted Average Amounts Used In Calculating Earnings Per Share [Line Items]      
Dividends paid $ 0.1375    
Restricted Stock Units (RSUs) [Member]      
Weighted Average Amounts Used In Calculating Earnings Per Share [Line Items]      
Stock options excluded from diluted earnings per share   98,991 357