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Summary of significant accounting policies (Details)
12 Months Ended
Jun. 27, 2015
USD ($)
item
Jun. 28, 2014
USD ($)
Jun. 29, 2013
Property, Plant and Equipment [Line Items]      
Fiscal year 364 days 364 days 364 days
Number of reporting units | item 6    
number of regions | item 3    
Number of reportable segments | item 2    
Provision for income taxes on unremitted earnings of foreign subsidiaries $ 0    
Cumulative unremitted earnings of foreign subsidiaries $ 3,060,000,000    
Forward exchange contracts, maximum maturities 60 days    
Minimum      
Property, Plant and Equipment [Line Items]      
Fiscal year 364 days    
Ownership interest in joint venture 50.00%    
Intangible asset, useful life 5 years    
Life of Maintenance Revenue Contracts 1 year    
Maximum      
Property, Plant and Equipment [Line Items]      
Fiscal year 371 days    
Ownership interest in joint ventures without significant influence 20.00%    
Intangible asset, useful life 10 years    
Life of Maintenance Revenue Contracts 3 years    
Level 1      
Property, Plant and Equipment [Line Items]      
Fair value of Cash equivalents recorded based upon level 1 $ 11,100,000 $ 19,700,000  
Building      
Property, Plant and Equipment [Line Items]      
Useful life 30 years    
Machinery Fixtures And Equipment      
Property, Plant and Equipment [Line Items]      
Useful life 10 years    
Machinery Fixtures And Equipment | Minimum      
Property, Plant and Equipment [Line Items]      
Useful life 2 years    
Information Technology Hardware and Software      
Property, Plant and Equipment [Line Items]      
Useful life 10 years    
Information Technology Hardware and Software | Minimum      
Property, Plant and Equipment [Line Items]      
Useful life 2 years