Shareholders' Equity - Share repurchase program (Details) - USD ($) $ in Millions	3 Months Ended		16 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 30, 2022	Jun. 16, 2022	Mar. 31, 2021
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, additional authorized amount				$ 100.0
Shares purchased	317,635	157,513	1,910,774
Stock repurchase cost	$ 11.9	$ 7.6	$ 83.1
Remaining authorized repurchase amount	$ 116.9		$ 116.9
Maximum
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, Authorized amount					$ 100.0