Pension and Postretirement Benefits Net Periodic Income and Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 01, 2017	Dec. 27, 2015	Jan. 01, 2017	Dec. 27, 2015
Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	$ 1,652	$ 909	$ 3,379	$ 1,766
Interest Cost on Projected Benefit Obligation	10,832	13,013	21,678	26,055
Expected Return on Plan Assets	(16,095)	(17,774)	(32,213)	(35,601)
Amortization of Prior Service Cost (Credit)	45	45	90	90
Amortization of Actuarial Loss	4,276	3,332	8,479	6,504
Net Periodic Expense (Income)	710	(475)	1,413	(1,186)
Other Postretirement Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	32	55	95	131
Interest Cost on Projected Benefit Obligation	597	813	1,191	1,622
Expected Return on Plan Assets	0	0	0	0
Amortization of Prior Service Cost (Credit)	(663)	(664)	(1,327)	(1,329)
Amortization of Actuarial Loss	661	1,065	1,398	2,022
Net Periodic Expense (Income)	$ 627	$ 1,269	$ 1,357	$ 2,446