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Divestitures - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
May 28, 2021
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
May 21, 2021
May 01, 2021
Divestitures [Line Items]            
Proceeds from sale of assets     $ 32,500,000 $ 0    
Loss on non-cancelable purchase commitment   $ 5,900,000        
Loss on inventory   6,600,000 $ 6,600,000 $ 0    
Myriad myPath LLC laboratory            
Divestitures [Line Items]            
Proceeds from sale of assets $ 32,500,000          
Net gain on sale of assets adjusted for transaction fees $ 31,200,000          
Held for sale            
Divestitures [Line Items]            
Impairment on write down of assets held for sale   $ 0        
Held for sale | Select operating assets and intellectual property of Myriad Autoimmune business unit            
Divestitures [Line Items]            
Cash consideration           $ 150,000,000.0
Held for sale | Myriad RBM, Inc.            
Divestitures [Line Items]            
Cash consideration         $ 198,000,000.0  
Aggregate adjustments for working capital, indebtedness, and transaction costs         $ (3,900,000)