Income taxes (Provision for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 30, 2018
Current:
Federal	$ (127,312)	$ (18,611)	$ 255,810
State and Local	17,983	8,523	(3,174)
Foreign	22,816	78,988	104,156
Total current taxes	(86,513)	68,900	356,792
Deferred:
Federal	14,844	17,725	(70,172)
State and Local	4,450	580	(10,551)
Foreign	(31,355)	(25,048)	11,897
Total deferred taxes	(12,061)	(6,743)	(68,826)
Income tax (benefit) expense	$ (98,574)	$ 62,157	$ 287,966