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Document and Entity Information
Sep. 21, 2020
Cover [Abstract]  
Entity Registrant Name MYRIAD GENETICS INC
Amendment Flag false
Entity Central Index Key 0000899923
Document Type 8-K
Document Period End Date Sep. 21, 2020
Entity Incorporation State Country Code DE
Entity File Number 0-26642
Entity Tax Identification Number 87-0494517
Entity Address, Address Line One 320 Wakara Way
Entity Address, City or Town Salt Lake City
Entity Address, State or Province UT
Entity Address, Postal Zip Code 84108
City Area Code (801)
Local Phone Number 584-3600
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Public Common Stock, $0.01 par value
Trading Symbol MYGN
Security Exchange Name NASDAQ
Entity Emerging Growth Company false