Derivative financial instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jul. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative financial instrument (loss) gain	$ 2,735	$ (8,624)	$ 274
Other expenses, net
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative financial instrument (loss) gain		$ 35,000
Equity securities | Other expenses, net | Not Designated as Hedging Instrument | Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative financial instrument (loss) gain	$ (34,000)