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Goodwill and Intangible Assets - Summarized Amounts Reported as Intangible Assets (Detail) - USD ($)
$ in Millions
Jun. 30, 2019
Jun. 30, 2018
Intangible Assets [Line Items]    
Gross Carrying Amount, amortizable intangible assets $ 823.3 $ 534.0
Gross Carrying Amount, total intangible assets 846.3 557.5
Accumulated Amortization (161.6) (102.3)
Net, amortizable intangible assets 661.7 431.7
Net, total intangible assets 684.7 455.2 [1]
Net, non-amortizable intangible assets 23.0 23.5
In-Process Research and Development [Member]    
Intangible Assets [Line Items]    
Net, non-amortizable intangible assets 23.0 23.5
Purchased Licenses and Technologies [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amount, amortizable intangible assets 815.7 526.4
Accumulated Amortization (156.6) (98.0)
Net, amortizable intangible assets 659.1 428.4
Customer Relationships [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amount, amortizable intangible assets 4.6 4.6
Accumulated Amortization (3.8) (3.3)
Net, amortizable intangible assets 0.8 1.3
Trademarks [Member]    
Intangible Assets [Line Items]    
Gross Carrying Amount, amortizable intangible assets 3.0 3.0
Accumulated Amortization (1.2) (1.0)
Net, amortizable intangible assets $ 1.8 $ 2.0
[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements of this report for additional information.