Derivative financial instruments (Details) - USD ($)	3 Months Ended
	Oct. 01, 2016	Jul. 02, 2016	Oct. 03, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Average length of time of Foreign exchange contracts	47 days	53 days
Not Designated as Hedging Instrument | Foreign Exchange Forward
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (8,646,000)		$ 18,769,000
Other expenses, net
Derivative Instruments, Gain (Loss) [Line Items]
Net derivative financial instrument gain (loss)	$ (8,000,000)