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Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
 12 Months Ended
Mar. 29, 2024
Mar. 31, 2023
Mar. 25, 2022
Statement of Comprehensive Income [Abstract]      
Net income $ 152,888 $ 187,494 $ 119,555
Net income attributable to non-controlling interests 191 137 148
Net income attributable to Allegro MicroSystems, Inc. 152,697 187,357 119,407
Other comprehensive (loss) income:      
Foreign currency translation adjustment (7,720) (2,892) (8,110)
Net actuarial (loss) gain amortization of net transition obligation and prior service costs related to defined benefit plans, net of tax of $145, $(164) and $(472) in fiscal years 2024, 2023 and 2022, respectively (434) 492 1,416
Comprehensive income 144,543 184,957 112,713
Other comprehensive gain attributable to non-controlling interests 97 64 111
Comprehensive income attributable to Allegro MicroSystems, Inc. $ 144,640 $ 185,021 $ 112,824