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Acquisitions - Preliminary Identified Intangible Assets Acquired (Details) - USD ($)
$ in Millions
Jun. 29, 2019
May 31, 2019
Oct. 30, 2018
Jun. 30, 2018
Mar. 15, 2018
Aug. 09, 2017
Jul. 01, 2017
Business Acquisition [Line Items]              
Goodwill, net $ 381.1     $ 336.3     $ 151.6
3Z Telecom, Inc.              
Business Acquisition [Line Items]              
Tangible assets acquired:   $ 4.1          
Goodwill, net   12.2          
Total purchase price   28.7          
3Z Telecom, Inc. | Developed technology              
Business Acquisition [Line Items]              
Intangible assets acquired:   4.4          
3Z Telecom, Inc. | Customer relationships              
Business Acquisition [Line Items]              
Intangible assets acquired:   7.9          
3Z Telecom, Inc. | Customer backlog              
Business Acquisition [Line Items]              
Intangible assets acquired:   $ 0.1          
RPC Photonics, Inc.              
Business Acquisition [Line Items]              
Tangible assets acquired:     $ 5.7        
Goodwill, net     33.9        
Total purchase price     69.6        
RPC Photonics, Inc. | Developed technology              
Business Acquisition [Line Items]              
Intangible assets acquired:     15.7        
RPC Photonics, Inc. | Customer relationships              
Business Acquisition [Line Items]              
Intangible assets acquired:     14.0        
RPC Photonics, Inc. | Customer backlog              
Business Acquisition [Line Items]              
Intangible assets acquired:     $ 0.3        
AW              
Business Acquisition [Line Items]              
Tangible assets acquired:         $ 59.0    
Goodwill, net         175.8    
Total purchase price         466.8    
AW | Developed technology              
Business Acquisition [Line Items]              
Intangible assets acquired:         113.5    
AW | Customer relationships              
Business Acquisition [Line Items]              
Intangible assets acquired:         75.0    
AW | Trade names              
Business Acquisition [Line Items]              
Intangible assets acquired:         28.0    
AW | In-process research and development              
Business Acquisition [Line Items]              
Intangible assets acquired:         9.0    
AW | Customer backlog              
Business Acquisition [Line Items]              
Intangible assets acquired:         $ 6.5    
Trilithic              
Business Acquisition [Line Items]              
Tangible assets acquired:           $ 11.8  
Goodwill, net           17.8  
Total purchase price           56.4  
Trilithic | Developed technology              
Business Acquisition [Line Items]              
Intangible assets acquired:           15.5  
Trilithic | Customer relationships              
Business Acquisition [Line Items]              
Intangible assets acquired:           11.0  
Trilithic | Other              
Business Acquisition [Line Items]              
Intangible assets acquired:           $ 0.3