Cover - shares	9 Months Ended
	Sep. 30, 2022	Oct. 27, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	0-26642
Entity Registrant Name	MYRIAD GENETICS, INC.
Entity Incorporation, State or Country Code	DE
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
Title of 12(b) Security	Common Stock, $0.01 par value
Trading Symbol	MYGN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		81,033,816
Amendment Flag	false
Entity Central Index Key	0000899923
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3