CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 23, 2022	Sep. 24, 2021	Sep. 23, 2022	Sep. 24, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 50,648	$ 33,223	$ 60,931	$ 60,930
Net income attributable to non-controlling interests	34	37	70	75
Net income attributable to Allegro MicroSystems, Inc.	50,614	33,186	60,861	60,855
Other comprehensive loss:
Foreign currency translation adjustment	(7,899)	(3,537)	(14,717)	(3,567)
Comprehensive income	42,715	29,649	46,144	57,288
Other comprehensive loss attributable to non-controlling interest	69	34	137	64
Comprehensive income attributable to Allegro MicroSystems, Inc.	$ 42,784	$ 29,683	$ 46,281	$ 57,352