Interim Financial Statements - Additional Information (Detail) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Jan. 05, 2023	May 31, 2023	May 31, 2023	May 31, 2022
Equity Class Of Treasury Stock [Line Items]
Stock repurchased authorized amount		$ 100.0	$ 100.0
Stock repurchase program remaining authorized repurchase amount		$ 53.9	$ 53.9
Stock repurchase program number of shares repurchased				0
Number of shares repurchased		1,200,000	1,700,000
Number of shares repurchased amount		$ 32.0	$ 49.4
Share repurchase program, current authorization of shares purchased			1,600,000
Share repurchase program, current authorization of shares purchased amount			$ 46.1
Share repurchase program expiration date			Jan. 31, 2023
Stock repurchase program extension date	Jan. 31, 2025