Shareholders' equity (Details) - USD ($)	3 Months Ended
	Sep. 29, 2023	Sep. 30, 2022	Aug. 31, 2023	Jun. 30, 2023	Aug. 31, 2022	Aug. 31, 2020	May 31, 2019	Feb. 28, 2018	Aug. 31, 2017
Shareholders Equity [Line Items]
Ordinary shares, authorized share capital (in shares)	500,000,000			500,000,000
Ordinary shares, par value (in USD per share)	$ 0.01			$ 0.01
Preferred shares, shares authorized (in shares)	5,000,000			5,000,000
Preferred shares, par value (in USD per share)	$ 0.01			$ 0.01
Share repurchase program, approved amount									$ 30,000,000
Share repurchase program, increase in shares authorized for repurchase			$ 47,600,000		$ 78,700,000	$ 58,500,000	$ 50,000,000	$ 30,000,000
Treasury stock, carrying basis	$ 100,000,000				$ 294,800,000
1999 and 2010 Stock Plan
Shareholders Equity [Line Items]
Ordinary shares issued upon vesting of restricted shares (in shares)	146,794	196,847