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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jun. 29, 2019
Business Acquisition      
Fully amortized intangibles $ 5.5    
Carrying amount 241.2 $ 316.8  
Amortization of intangibles 85.7 78.6 $ 54.6
In-process research and development      
Business Acquisition      
Carrying amount $ 10.0 10.0  
Useful life 3 years    
Finite-lived intangible assets reclassified   $ 84.0  
In-process research and development | Minimum      
Business Acquisition      
Useful life   4 years  
In-process research and development | Maximum      
Business Acquisition      
Useful life   7 years  
Intellectual Property      
Business Acquisition      
Payments to acquire finite lived intangible assets $ 10.0    
Useful life 5 years    
Disposal group, not discontinued operations | In-process research and development | Product lines in Datacom business      
Business Acquisition      
Disposal of intangible assets     1.0
Oclaro      
Business Acquisition      
Payments to acquire finite lived intangible assets     $ 443.0