CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 29, 2023	Sep. 23, 2022	Sep. 29, 2023	Sep. 23, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 65,671	$ 50,648	$ 126,560	$ 60,931
Net income attributable to non-controlling interests	54	34	93	70
Net income attributable to Allegro MicroSystems, Inc.	65,617	50,614	126,467	60,861
Other comprehensive loss:
Foreign currency translation adjustment, net of tax	(4,348)	(7,899)	(4,806)	(14,717)
Comprehensive income	61,269	42,715	121,661	46,144
Other comprehensive gain attributable to non-controlling interests	37	69	81	137
Comprehensive income attributable to Allegro MicroSystems, Inc.	$ 61,306	$ 42,784	$ 121,742	$ 46,281