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Acquisitions - Preliminary Identified Intangible Assets Acquired (Details) - USD ($)
$ in Millions
Jun. 27, 2020
Jun. 29, 2019
May 31, 2019
Oct. 30, 2018
Jun. 30, 2018
Mar. 15, 2018
Aug. 09, 2017
Business Acquisition [Line Items]              
Goodwill, net $ 381.4 $ 381.1     $ 336.3    
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