Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands	Jun. 28, 2024	Mar. 29, 2024
Revenue from Contract with Customer [Abstract]
Trade accounts receivable, returns, credits issued, and price protection adjustments, current	$ 39,174	$ 44,797

Accounts Receivable, Returns, Credits Issued, And Price Protection Adjustments, Current

No definition available.

Name:	algm_AccountsReceivableReturnsCreditsIssuedAndPriceProtectionAdjustmentsCurrent
Namespace Prefix:	algm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant