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OTHER LONG-TERM LIABILITIES - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other Liabilities Disclosure [Abstract]
Escrow liability	$ 7.5	$ 7.5
Legal settlements	$ 24.0	$ 0.0

X

- Definition

Escrow Liability, Noncurrent

+ References

No definition available.

+ Details

Name:	mygn_EscrowLiabilityNoncurrent
Namespace Prefix:	mygn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Legal Charges Pending Settlement, Noncurrent

+ References

No definition available.

+ Details

Name:	mygn_LegalChargesPendingSettlementNoncurrent
Namespace Prefix:	mygn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_OtherLiabilitiesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration