Company-Sponsored Employee Benefit Plans (Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 29, 2013
Change in plan assets:
Cash surrender value of corporate-owned life insurance	$ 162,800	$ 161,900
Accumulated other comprehensive loss (income)
Prior service cost	50,839	61,204
Actuarial losses (gains)	1,094,148	1,052,364
Total amount recognized	1,144,987	1,113,568
Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	3,671,708	3,089,022
Service cost	11,263	9,657	$ 70,166
Interest cost	171,120	160,436	148,561
Amendments	914	(347)
Actuarial (gain) loss, net	(86,129)	492,720
Total disbursements	(89,749)	(79,780)
Benefit obligation at end of year	3,679,127	3,671,708	3,089,022
Change in plan assets:
Fair value of plan assets at beginning of year	2,937,519	2,518,009
Actual return on plan assets	80,225	474,538
Employer contributions	75,133	24,752
Total disbursements	(89,749)	(79,780)
Fair value of plan assets at end of year	3,003,128	2,937,519	2,518,009
Funded status at end of year	(675,999)	(734,189)
Amounts recognized in the balance sheets
Current accrued benefit liability (Accrued expenses)	(27,942)	(25,712)
Non-current accrued benefit liability (Other long-term liabilities)	(648,057)	(708,477)
Defined benefit plans net amount recognized in balance sheet	(675,999)	(734,189)
Accumulated other comprehensive loss (income)
Prior service cost	50,109	60,306
Actuarial losses (gains)	1,101,051	1,058,651
Total amount recognized	1,151,160	1,118,957
Accumulated benefit obligation for all pension benefit plans	3,700,000	3,700,000
Accumulated benefit obligations/aggregate benefit obligation in excess of fair value of plan assets
Accumulated benefit obligation/aggregate benefit obligation	3,667,031	3,660,227
Fair value of plan assets at end of year	3,003,128	2,937,519
Other Postretirement Plans
Change in benefit obligation:
Benefit obligation at beginning of year	12,611	14,248
Service cost	536	546	541
Interest cost	590	748	614
Amendments	0	0
Actuarial (gain) loss, net	(1,050)	(3,280)
Total disbursements	329	349
Benefit obligation at end of year	13,016	12,611	14,248
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	(329)	(349)
Total disbursements	329	349
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	(13,016)	(12,611)
Amounts recognized in the balance sheets
Current accrued benefit liability (Accrued expenses)	(327)	(313)
Non-current accrued benefit liability (Other long-term liabilities)	(12,689)	(12,298)
Defined benefit plans net amount recognized in balance sheet	(13,016)	(12,611)
Accumulated other comprehensive loss (income)
Prior service cost	730	898
Actuarial losses (gains)	(6,903)	(6,287)
Total amount recognized	(6,173)	(5,389)
Accumulated benefit obligations/aggregate benefit obligation in excess of fair value of plan assets
Accumulated benefit obligation/aggregate benefit obligation	13,016	12,611
Fair value of plan assets at end of year		0
Supplemental executive retirement plan
Change in plan assets:
Cash surrender value of corporate-owned life insurance	$ 97,200	$ 96,500