Employee Benefit Costs (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jul. 02, 2017
Payment for Pension Benefits	$ 0	$ 30,000	$ 0
Accumulated benefit obligation for defined benefit pension plans	$ 998,000	959,000
Annual rate of increase in per capita cost of health care claims, current fiscal year	5.80%
Annual rate of increase in per capita cost of health care claims, ultimate trend rate	4.50%
Health care claims, year that ultimate trend rate reached	2038
Increase in accumulated postretirement benefit due to increase of one percentage point	$ 800
Increase in service and interest cost due to increase of one percentage point	41
Decrease in accumulated postretirement benefit due to decrease of one percentage point	(800)
Decrease in service and interest cost due to decrease of one percentage point	(46)
Pension benefit obligation and offsetting assets removed by annuitizing a portion of the qualified pension plan obligation	100,000
Non cash charge related to annuitization of a portion of the qualified pension plan obligation	41,200
Non cash charge related to annuitization of a portion of the qualified pension plan obligation, post-tax	29,600
Required minimum contributions to qualified pension plan in fiscal 2018	$ 0
Nonelective contribution percentage	3.00%
Employer Contributions	$ 14,900
Pension Settlement Expense	521	41,157	0
Other Postretirement Benefits [Member]
Pension Settlement Expense	$ 0	$ 0	0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.55%	4.25%
Pension Benefits [Member]
Pension Settlement Expense	$ 521	$ 41,157	$ 0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.60%	4.30%
Minimum [Member]
Maximum percentage of participant salary matched	1.50%
Maximum [Member]
Maximum percentage of participant salary matched	4.00%