XML 53 R38.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Basis of Presentation - Additional Information (Detail) | Sep. 30, 2016
--- | ---
Assurex Health |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Non controlling interest ownership percentage by parent | 85.00%
Centre For Addiction And Mental Health |
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] |
Non controlling interest ownership percentage by noncontrolling owners | 15.00%

X
- Definition Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] + References No definition available. + Details
Name: | mygn_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix: | mygn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mygn_AssurexHealthIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mygn_CentreForAddictionAndMentalHealthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |