Company-Sponsored Employee Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,815,000	$ 2,414,000	$ 8,445,000	$ 7,242,000
Interest cost	42,779,000	40,109,000	128,338,000	120,327,000
Expected return on plan assets	(57,156,000)	(48,199,000)	(171,468,000)	(144,597,000)
Amortization of prior service cost	2,778,000	2,786,000	8,332,000	8,358,000
Amortization of actuarial loss (gain)	4,968,000	4,082,000	14,904,000	12,246,000
Amortization of transition obligation	0	0
Net pension costs/ Net other postretirement benefit costs	(3,816,000)	1,192,000	(11,449,000)	3,576,000
Employer contributions			68,800,000	18,500,000
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	134,000	136,000	402,000	409,000
Interest cost	148,000	187,000	444,000	561,000
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	42,000	42,000	126,000	126,000
Amortization of actuarial loss (gain)	(109,000)	(36,000)	(327,000)	(108,000)
Amortization of transition obligation	0	0
Net pension costs/ Net other postretirement benefit costs	$ 215,000	$ 329,000	$ 645,000	$ 988,000