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Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Reconciliation of Segment Assets to Consolidated Total Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Segment Reporting, Asset Reconciling Item [Line Items]    
Consolidated total assets $ 871.3 $ 803.2
Cash and cash equivalents 428.9 414.6
Short-term investments 178.1 109.4
Other current assets 91.5 106.3
Property, plant and equipment, net 248.4 241.9
Right-of-use asset 174.3 64.5
Other assets and long-term investments 40.1 47.5
Consolidated total assets 3,631.1 3,416.3
Segment Reconciling Items [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Cash and cash equivalents 428.9 414.6
Short-term investments 178.1 109.4
Other current assets 91.5 106.3
Property, plant and equipment, net 248.4 241.9
Right-of-use asset 174.3 64.5
Goodwill and intangible assets, net 1,592.5 1,623.1
Other assets and long-term investments 46.1 53.3
Consolidated total assets $ 3,631.1 $ 3,416.3