Income taxes - Textuals (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jun. 29, 2019
Income taxes
Loss before income taxes, Domestic	$ (89,400)	$ (254,800)	$ 54,900
Income before income taxes, Foreign	$ 262,300	$ 125,200	$ 181,700
Effective tax rate	(11.70%)	76.00%	25.50%
Deferred tax assets	$ 177,580	$ 187,553
Increase in valuation allowance due to tax rate change in the United Kingdom	25,200
Increase in valuation allowance due to changing foreign exchange rates	10,000
Decrease in valuation allowance due to current year activity in the United States	27,600
Net operating loss carry forward	1,450,000
Operating loss carry forward, subject to expiration	35,200
Deferred tax assets operating loss carry forwards expiring in next three years and after	301,900
Operating loss carry forward, not subject to expiration	1,120,000
Unrecognized tax benefits including interest and penalties	145,100
Accrued interest expense and penalties	26,400	$ 20,200
Tax contingencies settled	11,300
Expected cash payment for settlement	$ 2,400