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Revenue from Contracts with Customers - Additional Information (Details) - USD ($) $ in Thousands | Dec. 29, 2023 | Mar. 31, 2023
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Revenue from Contract with Customer [Abstract] |  |
Trade accounts receivable, returns, credits issued, and price protection adjustments, current | $ 35,342 | $ 30,571

X
- Definition Accounts Receivable, Returns, Credits Issued, And Price Protection Adjustments, Current + References No definition available. + Details
Name: | algm_AccountsReceivableReturnsCreditsIssuedAndPriceProtectionAdjustmentsCurrent
Namespace Prefix: | algm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration