Retirement And Other Benefit Plans (Schedule Of Components Of Net Periodic Benefit Cost) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012	Jul. 30, 2011
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,844	$ 2,398	$ 5,830	$ 4,458
Interest cost	3,180	3,150	6,364	6,242
Expected return on assets	(6,261)	(5,191)	(12,540)	(10,364)
Amortization of Actuarial loss (gain)	45	108	125	207
Amortization of Prior service expense (income)	4	(3)	4	(3)
Amortization of Net transition asset	(11)	(12)	(22)	(23)
Total net periodic benefit (income) cost	(199)	450	(239)	517
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	36	44	76	88
Amortization of Actuarial loss (gain)	(23)	(25)	(36)	(50)
Total net periodic benefit (income) cost	$ 13	$ 19	$ 40	$ 38