XML 74 R41.htm IDEA: XBRL DOCUMENT v3.3.0.814

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 177.3	$ 177.2
Diagnostics
Goodwill And Intangible Assets [Line Items]
Goodwill	112.3
Other
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 65.0

X

- Definition

Goodwill And Intangible Assets [Line Items]

+ References

No definition available.

+ Details

Name:	mygn_GoodwillAndIntangibleAssetsLineItems
Namespace Prefix:	mygn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 20



-Section 50



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 20



-Section 45



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=mygn_DiagnosticsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: