Employee Benefit Costs Employee Benefit Costs (Expected Future Benefit Payments) (Details) $ in Thousands	Jul. 03, 2016 USD ($)
Pension Benefits [Member] | Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 74,476
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	74,240
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	74,093
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	73,811
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	73,367
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	352,067
Pension Benefits [Member] | Non-Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	2,964
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	2,983
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	3,136
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	3,159
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	3,200
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	16,887
Other Postretirement Benefits [Member] | Retiree Medical [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	7,778
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	7,094
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	5,924
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	5,104
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	4,250
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	12,984
Other Postretirement Benefits [Member] | Retiree Life [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	1,345
Defined Benefit Plan, Expected Future Benefit Payments, Year Two	1,365
Defined Benefit Plan, Expected Future Benefit Payments, Year Three	1,383
Defined Benefit Plan, Expected Future Benefit Payments, Year Four	1,398
Defined Benefit Plan, Expected Future Benefit Payments, Year Five	1,409
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter	$ 7,082