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Share-based compensation (Details) - Equity Component [Domain] - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares available to be granted 5,100    
Share-based compensation $ 31,600 $ 24,600 $ 18,400
Unrecognized share-based compensation expense $ 35,300    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Beginning options outstanding, number of options 850    
Granted, number of options 181    
Exercised, number of options (170)    
Forfeited or expired, number of options (4)    
Ending options outstanding, number of options 857 850  
Beginning options outstanding, weighted average exercise price $ 77.26    
Granted, weighted average exercise price 147.75    
Exercised, weighted average exercise price 49.26    
Forfeited or expired, weighted average exercise price 128.76    
Ending options outstanding, weighted average exercise price $ 97.49 $ 77.26  
Options exercisable, number of options 515    
Options expected to vest, number of options 334    
Options exercisable, weighted average exercise price $ 74.16    
Options expected to vest, weighted average exercise price $ 132.47    
Options expected to vest, weighted average remaining term in years 8 years 4 months 24 days    
Options outstanding, aggregate intrinsic value $ 79,760    
Options exercisable, aggregate intrinsic value 59,900    
Options expected to vest, aggregate intrinsic value 19,400    
Options exercised, aggregate intrinsic value $ 20,700 $ 17,800 $ 29,500
Options granted, weighted average grant date fair value $ 39.96 $ 38.28 $ 34.24
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]      
Dividend yield 0.30% 0.30% 0.30%
Volatility, as a percent 27.10% 32.70% 34.90%
Risk-free interest rate 1.70% 1.80% 0.80%
Expected life in years after vest date 5 years 3 months 18 days 5 years 3 months 18 days 5 years 4 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 8 months 12 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 6 years 7 months 6 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 5 years 4 months 24 days    
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 1 year    
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 10 years    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Beginning non-vested shares/units outstanding, number of shares/units 9    
Granted, number of shares/units 0    
Vested, number of shares/units (9)    
Cancelled, number of shares/units 0    
Ending non-vested shares/units outstanding, number of shares/units 0 9  
Beginning non-vested shares/units, weighted average grant date fair value $ 100.84    
Granted, weighted average grant date fair value 0.00 $ 145.19 $ 100.84
Vested, weighted average grant date fair value 100.84    
Cancelled, weighted average grant date fair value 0.00    
Ending non-vested shares/units, weighted average grant date fair value $ 0.00 $ 100.84  
Non-vested shares/units, weighted average remaining term in years      
Non-vested shares/units, aggregate intrinsic value $ 0    
Vested, total fair value $ 900 $ 2,300 $ 600
Service-based Restricted Share Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Beginning non-vested shares/units outstanding, number of shares/units 247    
Granted, number of shares/units 135    
Vested, number of shares/units (91)    
Cancelled, number of shares/units (8)    
Ending non-vested shares/units outstanding, number of shares/units 283 247  
Beginning non-vested shares/units, weighted average grant date fair value $ 112.89    
Granted, weighted average grant date fair value 153.99 $ 133.08 $ 109.20
Vested, weighted average grant date fair value 99.54    
Cancelled, weighted average grant date fair value 126.13    
Ending non-vested shares/units, weighted average grant date fair value $ 136.48 $ 112.89  
Non-vested shares/units, weighted average remaining term in years 1 year 2 months 12 days    
Non-vested shares/units, aggregate intrinsic value $ 53,900    
Vested, total fair value $ 9,100 $ 6,800 $ 5,700
Performance-based Restricted Share Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Beginning non-vested shares/units outstanding, number of shares/units 182    
Granted, number of shares/units 106    
Vested, number of shares/units (56)    
Cancelled, number of shares/units (3)    
Ending non-vested shares/units outstanding, number of shares/units 229 182  
Beginning non-vested shares/units, weighted average grant date fair value $ 109.63    
Granted, weighted average grant date fair value 150.14 $ 119.85 $ 108.6
Vested, weighted average grant date fair value 91.14    
Cancelled, weighted average grant date fair value 126.96    
Ending non-vested shares/units, weighted average grant date fair value $ 129.77 $ 109.63  
Non-vested shares/units, weighted average remaining term in years 1 year 4 months 17 days    
Non-vested shares/units, aggregate intrinsic value $ 43,625    
Vested, total fair value $ 5,100 $ 4,600 $ 5,000