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Subsequent Events (Details) - Subsequent event - Gateway Genomics, LLC $ in Millions	Nov. 01, 2022 USD ($)
Subsequent Event [Line Items]
Upfront cash purchase price	$ 67.5
Cash consideration	$ 32.5

X

- Definition

Payments To Acquired Businesses, Gross, Variable Consideration Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	mygn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

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Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Period Type:	duration

X

- Details

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X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=mygn_GatewayGenomicsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: