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Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Jun. 30, 2019
Goodwill And Intangible Assets [Line Items]    
Goodwill $ 408.1 $ 417.2
Diagnostics [Member]    
Goodwill And Intangible Assets [Line Items]    
Goodwill 351.3  
Other [Member]    
Goodwill And Intangible Assets [Line Items]    
Goodwill $ 56.8