Company-Sponsored Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Sep. 27, 2014	Sep. 28, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,815,000	$ 2,414,000
Interest cost	42,779,000	40,109,000
Expected return on plan assets	(57,156,000)	(48,199,000)
Amortization of prior service cost	2,777,000	2,786,000
Amortization of actuarial loss (gain)	4,968,000	4,082,000
Net pension costs/ Net other postretirement benefit costs	(3,817,000)	1,192,000
Employer contributions	56,100,000	5,800,000
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	134,000	136,000
Interest cost	148,000	187,000
Expected return on plan assets	0	0
Amortization of prior service cost	42,000	42,000
Amortization of actuarial loss (gain)	(109,000)	(36,000)
Net pension costs/ Net other postretirement benefit costs	$ 215,000	$ 329,000