Company-Sponsored Employee Benefit Plans (Level 3 Rollforward) (Details) - Retirement Plan - USD ($) $ in Thousands	12 Months Ended
	Jun. 27, 2015	Jun. 28, 2014
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	$ 2,937,519
Fair value of plan assets at end of year	3,003,128	$ 2,937,519
Real estate
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	149,653
Fair value of plan assets at end of year	163,669	149,653
Private equity
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	31,204
Fair value of plan assets at end of year	52,891	31,204
Hedge funds
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at end of year	335,265
Level 3
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	66,607	79,220
Actual return on plan assets still held at the reporting date	22,825	4,975
Actual return on plan assets sold during the period	2,842	5,074
Purchases and sales, net	434,165	(22,662)
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	526,439	66,607
Level 3 | Real estate
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	35,403	64,845
Actual return on plan assets still held at the reporting date	8,122	3,044
Actual return on plan assets sold during the period	1,062	3,307
Purchases and sales, net	93,696	(35,793)
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	138,283	35,403
Level 3 | Private equity
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	31,204	14,375
Actual return on plan assets still held at the reporting date	2,438	1,931
Actual return on plan assets sold during the period	1,780	1,767
Purchases and sales, net	17,469	13,131
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	52,891	31,204
Level 3 | Hedge funds
Change in Fair Value of Plan Assets, Level 3 Reconciliation
Fair value of plan assets at beginning of year	0	0
Actual return on plan assets still held at the reporting date	12,265	0
Actual return on plan assets sold during the period	0	0
Purchases and sales, net	323,000	0
Transfers in and/or out of Level 3	0	0
Fair value of plan assets at end of year	$ 335,265	$ 0