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Segment and Related Information - Schedule Of Comparison Of Balance Sheet Assets By Operating Segment (Detail) - USD ($)
$ in Millions
Jun. 30, 2015
Jun. 30, 2014
Segment Reporting Information [Line Items]    
Net equipment, leasehold improvements and property $ 67.2 $ 34.6
Total assets by segment 766.2 823.8
Operating Segments    
Segment Reporting Information [Line Items]    
Net equipment, leasehold improvements and property 67.2 34.6
Total assets by segment 580.8 553.3
Operating Segments | Diagnostics    
Segment Reporting Information [Line Items]    
Net equipment, leasehold improvements and property 34.5 24.3
Total assets by segment 450.6 409.9
Operating Segments | Other    
Segment Reporting Information [Line Items]    
Net equipment, leasehold improvements and property 32.7 10.3
Total assets by segment $ 130.2 $ 143.4