Company-Sponsored Employee Benefit Plans (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,414,000	$ 17,589,000	$ 4,828,000	$ 35,369,000
Interest cost	40,109,000	37,253,000	80,218,000	74,953,000
Expected return on plan assets	(48,199,000)	(42,800,000)	(96,398,000)	(85,601,000)
Amortization of prior service cost	2,786,000	2,273,000	5,572,000	3,734,000
Amortization of actuarial loss (gain)	4,082,000	18,328,000	8,164,000	37,350,000
Amortization of transition obligation	0	0	0	0
Curtailment loss	0	8,293,000	0	8,293,000
Net pension costs/ Net other postretirement benefit costs	1,192,000	40,936,000	2,384,000	74,098,000
Employer contributions			11,700,000	11,300,000
Other Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	136,000	136,000	272,000	271,000
Interest cost	187,000	153,000	374,000	307,000
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	42,000	42,000	84,000	84,000
Amortization of actuarial loss (gain)	(36,000)	(51,000)	(72,000)	(102,000)
Amortization of transition obligation	0	36,000	0	71,000
Curtailment loss	0	0	0	0
Net pension costs/ Net other postretirement benefit costs	$ 329,000	$ 316,000	$ 658,000	$ 631,000