Employee Benefit Costs (Schedule of Reconciliation of Obligations, Plan Assets and Funded Status) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jul. 01, 2012
Fair Value of Plan Assets at End of Year	$ 1,043,466	$ 962,633
Pension Benefits [Member]
Discounted Rate Used to Determine Present Value of Projected Benefit Obligation	4.40%	5.00%
Defined Benefit Plan Assumptions Used Calculating Projected Benefit Obligation Expected Long Term Return On Assets	8.00%	8.25%
Service Cost	7,645	13,222	13,764
Interest Cost	53,743	50,154	56,762
Plan Assets (Less Than) in Excess of Projected Benefit Obligation	(129,681)	(153,222)
Accrued Pension Cost	(126,529)	(150,131)
Accrued Wages and Salaries	(3,152)	(3,091)
Accrued Postretirement Health Care Obligation	0	0
Accrued Liabilities	0	0
Defined Benefit Plan Accrued Employee Benefits	0	0
Net Amount Recognized at End of Year	(129,681)	(153,222)
Transition Assets (Obligation)	0	0
Net Actuarial Loss	(190,756)	(211,444)
Prior Service Credit (Cost)	(550)	(660)
Net Amount Recognized at End of Year	(191,306)	(212,104)
Other Postretirement Benefits [Member]
Discounted Rate Used to Determine Present Value of Projected Benefit Obligation	3.95%	4.40%
Service Cost	333	358	407
Interest Cost	4,565	4,754	6,468
Plan Assets (Less Than) in Excess of Projected Benefit Obligation	(96,457)	(111,506)
Accrued Pension Cost	0	0
Accrued Wages and Salaries	0	0
Accrued Postretirement Health Care Obligation	(59,290)	(72,695)
Accrued Liabilities	(13,624)	(16,113)
Defined Benefit Plan Accrued Employee Benefits	(23,543)	(22,698)
Net Amount Recognized at End of Year	(96,457)	(111,506)
Transition Assets (Obligation)	0	0
Net Actuarial Loss	(21,962)	(28,668)
Prior Service Credit (Cost)	6,243	8,008
Net Amount Recognized at End of Year	(15,719)	(20,660)
Minimum [Member] | Pension Benefits [Member]
Expected Rate of Future Compensation Level Increases	3.00%	3.00%
Maximum [Member] | Pension Benefits [Member]
Expected Rate of Future Compensation Level Increases	4.00%	4.00%
Change In Benefit Obligations [Member] | Pension Benefits [Member]
Projected Benefit Obligation at Beginning of Year	1,115,855	1,236,747
Service Cost	7,645	13,222
Interest Cost	53,743	50,154
Plan Curtailments	0	(52,236)
Plan Participant Contributions	0	0
Actuarial (Gain) Loss	71,288	(56,239)
Benefits Paid	(75,384)	(75,793)
Projected Benefit Obligation at End of Year	1,173,147	1,115,855
Change In Benefit Obligations [Member] | Other Postretirement Benefits [Member]
Projected Benefit Obligation at Beginning of Year	111,506	136,854
Service Cost	333	358
Interest Cost	4,566	4,754
Plan Curtailments	0	0
Plan Participant Contributions	1,513	1,347
Actuarial (Gain) Loss	(5,447)	(13,309)
Benefits Paid	(16,014)	(18,498)
Projected Benefit Obligation at End of Year	96,457	111,506
Change In Plan Assets [Member] | Pension Benefits [Member]
Plan Participant Contributions	0	0
Benefits Paid	(75,384)	(75,793)
Fair Value of Plan Assets at Beginning of Year	962,633	937,745
Actual Return on Plan Assets	153,306	68,296
Employer Contributions	2,911	32,385
Fair Value of Plan Assets at End of Year	1,043,466	962,633
Change In Plan Assets [Member] | Other Postretirement Benefits [Member]
Plan Participant Contributions	1,512	1,347
Benefits Paid	(16,014)	(18,498)
Fair Value of Plan Assets at Beginning of Year	0	0
Actual Return on Plan Assets	0	0
Employer Contributions	14,502	17,151
Fair Value of Plan Assets at End of Year	$ 0	$ 0