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ACQUISITION (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Business Combination and Asset Acquisition [Abstract] |  |
Gain on acquisition | $ 2.2 | $ 0.0

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- Definition Asset Acquisition, Gain (Loss) + References No definition available. + Details
Name: | mygn_AssetAcquisitionGainLoss
Namespace Prefix: | mygn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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