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Divestitures - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
May 28, 2021
May 21, 2021
May 01, 2021
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Divestitures [Line Items]            
Proceeds from sale of assets         $ 0.0 $ 32.5
Loss on non-cancelable purchase commitment       $ 5.9    
Loss on inventory       6.6 $ 0.0 $ 6.6
Disposed of by sale | Myriad myPath LLC laboratory            
Divestitures [Line Items]            
Proceeds from sale of assets $ 32.5          
Net gain on sale of assets adjusted for transaction fees       $ 31.2    
Disposed of by sale | Select operating assets and intellectual property of Myriad Autoimmune business unit            
Divestitures [Line Items]            
Proceeds from sale of business     $ 150.0      
Disposed of by sale | Myriad RBM, Inc.            
Divestitures [Line Items]            
Proceeds from sale of business   $ 197.0