Company-Sponsored Employee Benefit Plans (Components of Net Benefit Costs and Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Amortization of prior service cost in next fiscal year	$ 11,280
Amortization of actuarial losses (gains) in next fiscal year	19,436
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	30,716
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	9,657	70,166	108,223
Interest cost	160,436	148,561	147,512
Expected return on plan assets	(192,795)	(171,201)	(161,605)
Amortization of prior service cost	11,145	9,899	4,806
Amortization of actuarial loss (gain)	16,327	72,624	60,166
Curtailment loss	0	8,293	0
Net pension costs/ Net other postretirement benefit costs	4,770	138,342	159,102
Amortization of prior service cost	11,145	18,192	4,806
Amortization of actuarial loss (gain)	16,327	72,624	60,166
Prior service cost arising in current year, before tax	347	(53,902)	(8,706)
Actuarial (loss) gain, net, arising in current year, before tax	(210,978)	366,957	(579,366)
Total changes recognized in other comprehensive (loss) income	(183,159)	403,871	(523,100)
Amortization of prior service cost in next fiscal year	11,111
Amortization of actuarial losses (gains) in next fiscal year	19,871
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	30,982
Other Postretirement Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]
Service cost	546	541	457
Interest cost	748	614	632
Amortization of prior service cost	168	168	215
Amortization of actuarial loss (gain)	(143)	(203)	(331)
Amortization of transition obligation	0	141	153
Net pension costs/ Net other postretirement benefit costs	1,319	1,261	1,126
Amortization of prior service cost	168	168	215
Amortization of actuarial loss (gain)	(143)	(203)	(331)
Amortization of transition obligation	0	141	153
Actuarial (loss) gain, net, arising in current year, before tax	3,280	(188)	(925)
Total changes recognized in other comprehensive (loss) income	3,305	(82)	(888)
Amortization of prior service cost in next fiscal year	169
Amortization of actuarial losses (gains) in next fiscal year	(435)
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	$ (266)