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. 29, 2013	Jun. 30, 2012	Jul. 02, 2011
Amortization of prior service cost	$ 18,360	$ 5,021	$ 4,145
Amortization of actuarial loss (gain)	72,421	59,835	79,564
Amortization of transition obligation	141	153	153
Prior service cost arising in current year, before tax	(53,902)	(8,706)	(9,239)
Actuarial (loss) gain, net arising in current year, before tax	366,769	(580,291)	83,898
Amortization of prior service cost in next fiscal year	11,313
Amortization of actuarial losses (gains) in next fiscal year	16,184
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	27,497
Pension Benefits [Member]
Service cost	70,166	108,223	99,443
Interest cost	148,561	147,512	134,973
Expected return on plan assets	(171,201)	(161,605)	(131,921)
Amortization of prior service cost	9,899	4,806	3,960
Amortization of actuarial loss (gain)	72,624	60,166	79,952
Curtailment loss	8,293	0	0
Net pension costs/ Net other postretirement benefit costs	138,342	159,102	186,407
Amortization of prior service cost	18,192	4,806	3,960
Amortization of actuarial loss (gain)	72,624	60,166	79,952
Prior service cost arising in current year, before tax	(53,902)	(8,706)	(8,252)
Actuarial (loss) gain, net arising in current year, before tax	366,957	(579,366)	84,055
Total changes recognized in other comprehensive (loss) income	403,871	(523,100)	159,715
Amortization of prior service cost in next fiscal year	11,145
Amortization of actuarial losses (gains) in next fiscal year	16,327
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	27,472
Other Postretirement Plans [Member]
Service cost	541	457	396
Interest cost	614	632	524
Amortization of prior service cost	168	215	185
Amortization of actuarial loss (gain)	(203)	(331)	(388)
Amortization of transition obligation	141	153	153
Net pension costs/ Net other postretirement benefit costs	1,261	1,126	870
Amortization of prior service cost	168	215	185
Amortization of actuarial loss (gain)	(203)	(331)	(388)
Amortization of transition obligation	141	153	153
Prior service cost arising in current year, before tax	0	0	(987)
Actuarial (loss) gain, net arising in current year, before tax	(188)	(925)	(157)
Total changes recognized in other comprehensive (loss) income	(82)	(888)	(1,194)
Amortization of prior service cost in next fiscal year	168
Amortization of actuarial losses (gains) in next fiscal year	(143)
Total amounts that will be amortized from accumulated other comprehensive loss (income) in next fiscal year	$ 25