Company-Sponsored Employee Benefit Plans (Funded Status) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 02, 2016	Jun. 27, 2015	Jun. 28, 2014
Change in plan assets:
Cash surrender value of corporate-owned life insurance	$ 163,300	$ 162,800
Accumulated other comprehensive loss (income)
Prior service cost	39,469	50,839
Actuarial losses (gains)	1,752,787	1,094,148
Total amount recognized	1,792,256	1,144,987
Accumulated benefit obligation for all pension benefit plans	4,300,000	3,700,000
Pension Benefits
Change in benefit obligation:
Benefit obligation at beginning of year	3,679,127	3,671,708
Service cost	11,815	11,263	$ 9,657
Interest cost	174,602	171,120	160,436
Amendments	0	914
Actuarial (gain) loss, net	517,070	(86,129)
Total disbursements	(97,838)	(89,749)
Benefit obligation at end of year	4,284,776	3,679,127	3,671,708
Change in plan assets:
Fair value of plan assets at beginning of year	3,003,128	2,937,519
Actual return on plan assets	52,268	80,225
Employer contributions	157,482	75,133
Total disbursements	(97,838)	(89,749)
Fair value of plan assets at end of year	3,115,040	3,003,128	2,937,519
Funded status at end of year	(1,169,736)	(675,999)
Amounts recognized in the balance sheets
Current accrued benefit liability (Accrued expenses)	(29,480)	(27,942)
Non-current accrued benefit liability (Other long-term liabilities)	(1,140,256)	(648,057)
Defined benefit plans net amount recognized in balance sheet	(1,169,736)	(675,999)
Accumulated other comprehensive loss (income)
Prior service cost	38,907	50,109
Actuarial losses (gains)	1,760,556	1,101,051
Total amount recognized	1,799,463	1,151,160
Accumulated benefit obligations/aggregate benefit obligation in excess of fair value of plan assets
Accumulated benefit obligation/aggregate benefit obligation	4,272,547	3,667,031
Fair value of plan assets at end of year	3,115,040	3,003,128
Other Postretirement Plans
Change in benefit obligation:
Benefit obligation at beginning of year	13,016	12,611
Service cost	547	536	546
Interest cost	622	590	748
Amendments	0	0
Actuarial (gain) loss, net	(1,348)	(1,050)
Total disbursements	608	329
Benefit obligation at end of year	13,445	13,016	12,611
Change in plan assets:
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	(608)	(329)
Total disbursements	608	329
Fair value of plan assets at end of year	0	0	$ 0
Funded status at end of year	(13,445)	(13,016)
Amounts recognized in the balance sheets
Current accrued benefit liability (Accrued expenses)	(300)	(327)
Non-current accrued benefit liability (Other long-term liabilities)	(13,145)	(12,689)
Defined benefit plans net amount recognized in balance sheet	(13,445)	(13,016)
Accumulated other comprehensive loss (income)
Prior service cost	562	730
Actuarial losses (gains)	(7,769)	(6,903)
Total amount recognized	(7,207)	(6,173)
Accumulated benefit obligations/aggregate benefit obligation in excess of fair value of plan assets
Accumulated benefit obligation/aggregate benefit obligation	13,445	13,016
Fair value of plan assets at end of year	0	0
Supplemental executive retirement plan
Change in plan assets:
Cash surrender value of corporate-owned life insurance	$ 97,000	$ 97,200