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Segment and Related Information - Reconciliation of Assets by Operating Segment and Geographic Region to Total Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets $ 1,404.6 $ 1,562.7
Operating segments and geographic region [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets 1,149.8 1,370.9
Cash, cash equivalents, and marketable investment securities [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Assets [1] $ 254.8 $ 191.8
[1] The Company manages cash, cash equivalents, and marketable investment securities at the consolidated level for all segments.