Employee Benefit Plans (Details) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Dec. 31, 2011	Jan. 01, 2011
Pension Benefits [Member]
Service cost	$ 27,056,000	$ 24,860,000	$ 54,111,000	$ 49,721,000
Interest cost	36,878,000	33,743,000	73,757,000	67,487,000
Expected return on plan assets	(40,402,000)	(32,980,000)	(80,803,000)	(65,960,000)
Amortization of prior service cost	1,201,000	990,000	2,402,000	1,979,000
Amortization of net actuarial loss (gain)	15,042,000	19,988,000	30,083,000	39,976,000
Amortization of transition obligation	0	0	0	0
Net pension costs/ Net other postretirement benefit costs	39,775,000	46,601,000	79,550,000	93,203,000
Employer contributions			11,100,000	9,700,000
Other Postretirement Plans [Member]
Service cost	114,000	99,000	228,000	198,000
Interest cost	158,000	131,000	316,000	262,000
Expected return on plan assets	0	0	0	0
Amortization of prior service cost	54,000	46,000	108,000	93,000
Amortization of net actuarial loss (gain)	(83,000)	(97,000)	(166,000)	(194,000)
Amortization of transition obligation	38,000	38,000	76,000	76,000
Net pension costs/ Net other postretirement benefit costs	281,000	217,000	562,000	435,000
Estimated contributions to defined benefit plans in current fiscal year	300,000		300,000
Qualified pension plan [Member]
Employer contributions made in prior year that would normally have been made in current fiscal year			140,000,000
Supplemental Executive Retirement Plan [Member]
Estimated contributions to defined benefit plans in current fiscal year	23,100,000		23,100,000
Amount received for redemption of corporate-owned life insurance policies	$ 75,000,000