Company-Sponsored Employee Benefit Plans (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		1 Months Ended
	Dec. 29, 2012 Pension Benefits [Member]	Dec. 31, 2011 Pension Benefits [Member]	Dec. 29, 2012 Pension Benefits [Member]	Dec. 31, 2011 Pension Benefits [Member]	Dec. 29, 2012 Other Postretirement Plans [Member]	Dec. 31, 2011 Other Postretirement Plans [Member]	Dec. 29, 2012 Other Postretirement Plans [Member]	Dec. 31, 2011 Other Postretirement Plans [Member]	Nov. 24, 2012 Supplemental Executive Retirement Plan Freeze Event [Member] Supplemental Executive Retirement Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 17,589,000	$ 27,056,000	$ 35,369,000	$ 54,111,000	$ 136,000	$ 114,000	$ 271,000	$ 228,000
Interest cost	37,253,000	36,878,000	74,953,000	73,757,000	153,000	158,000	307,000	316,000
Expected return on plan assets	(42,800,000)	(40,402,000)	(85,601,000)	(80,803,000)	0	0	0	0
Amortization of prior service cost	2,273,000	1,201,000	3,734,000	2,402,000	42,000	54,000	84,000	108,000
Amortization of actuarial loss (gain)	18,328,000	15,042,000	37,350,000	30,083,000	(51,000)	(83,000)	(102,000)	(166,000)
Amortization of transition obligation	0	0	0	0	36,000	38,000	71,000	76,000
Curtailment loss	8,293,000	0	8,293,000	0	0	0	0	0	8,300,000
Net periodic benefit cost	40,936,000	39,775,000	74,098,000	79,550,000	316,000	281,000	631,000	562,000
Discount rate used in calculating benefit obligation									3.96%
Actuarial (loss) gain, net arising in current year, before tax									73,000,000
Prior service cost arising in current year, before tax									48,600,000
Period for prior service cost amortization									7 years
Benefit obligation after plan freeze									486,600,000
Employer contributions			$ 11,300,000	$ 11,100,000