Long-term Debt (Revolving Facility And Letters Of Credit) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended			6 Months Ended		6 Months Ended				6 Months Ended		6 Months Ended
	Jul. 28, 2012	Jul. 30, 2011	Jul. 28, 2012 Letters Of Credit [Member]	Jul. 30, 2011 Amendment [Member]	Jul. 15, 2011 Before Amendment [Member] Revolving Credit Expiring August 2014 [Member]	Jul. 30, 2011 Before Amendment [Member] Revolving Credit Expiring August 2014 [Member] Letters Of Credit [Member]	Jul. 30, 2011 Before Amendment [Member] Revolving Credit Expiring August 2014 [Member] Committed And Unused Lines Of Credit [Member]	Jul. 30, 2011 Before Amendment [Member] Revolving Credit Expiring August 2014 [Member] Outstanding Borrowings [Member]	Jul. 15, 2011 After Amendment [Member] Revolving Credit Expiring July 2016 [Member]	Jul. 30, 2011 After Amendment [Member] Revolving Credit Expiring July 2016 [Member] Letters Of Credit [Member]	Jul. 30, 2011 After Amendment [Member] Revolving Credit Expiring July 2016 [Member] Outstanding Borrowings [Member]	Jul. 30, 2011 After Amendment [Member] Revolving Credit Expiring July 2016 [Member] Committed And Unused Lines Of Credit [Member]
Revolving facility, borrowing capacity					$ 800				$ 1,000
Fixed charge coverage ratio	1.75
Ratio of consolidated debt to consolidated EBITDA	4
Debt to EBITDA ratio required for unlimited investments and restricted payments	3
Line of Credit Financial Covenant Ratio of Consolidated Debt to Consolidated EBITDA Maximum Current Rate	3
Commitment fee percentage, unused capacity							0.50%					0.325%
Current credit fees percentage rate, letters of credit						3.00%				1.75%
Percentage spread over variable base rate								3.00%			1.75%
Fees related to the amendment of debt	0	7		7
Outstanding letters of credit			$ 15