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Acquisitions - Purchase Price Allocation (Details) - USD ($)
$ in Millions
Sep. 29, 2018
Jun. 30, 2018
Mar. 15, 2018
Business Acquisition [Line Items]      
Goodwill $ 341.1 $ 336.3  
AW business      
Business Acquisition [Line Items]      
Tangible assets acquired:     $ 59.3
Goodwill     178.5
Total purchase price     469.8
AW business | Developed technology      
Business Acquisition [Line Items]      
Intangible assets acquired:     113.5
AW business | Customer relationships      
Business Acquisition [Line Items]      
Intangible assets acquired:     75.0
AW business | Trade names      
Business Acquisition [Line Items]      
Intangible assets acquired:     28.0
AW business | Customer Backlog      
Business Acquisition [Line Items]      
Intangible assets acquired:     6.5
Trilithic, Inc      
Business Acquisition [Line Items]      
Tangible assets acquired:   11.8  
Goodwill   17.8  
Total purchase price   56.4  
Trilithic, Inc | Developed technology      
Business Acquisition [Line Items]      
Intangible assets acquired:   15.5  
Trilithic, Inc | Customer relationships      
Business Acquisition [Line Items]      
Intangible assets acquired:   11.0  
Trilithic, Inc | Other      
Business Acquisition [Line Items]      
Intangible assets acquired:   $ 0.3  
In-process research and development | AW business      
Business Acquisition [Line Items]      
Intangible assets acquired:     $ 9.0