XML 58 R34.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Schedule of Stock Repurchases (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013
Stockholders Equity [Line Items] |  |
Common stock and additional paid-in-capital reductions | $ 10,196 | $ 29,940
Charges to retained earnings | $ 35,433 | $ 72,376
Common Stock |  |
Stockholders Equity [Line Items] |  |
Shares purchased and retired | 1,218 | 3,806

X
- Definition Amount Charged To Retained Earnings As A Result Of Stock Repurchases. + References No definition available. + Details
Name: | mygn_AmountChargedToRetainedEarningsAsResultOfStockRepurchases
Namespace Prefix: | mygn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount Of Reduction In Common Stock As A Result Of Stock Repurchases + References No definition available. + Details
Name: | mygn_AmountOfReductionInCommonStockAsResultOfStockRepurchases
Namespace Prefix: | mygn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | mygn_StockholdersEquityLineItems
Namespace Prefix: | mygn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased and retired during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration