Debt And Credit Facilities (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		1 Months Ended	3 Months Ended
	Apr. 28, 2012	Apr. 30, 2011	Apr. 28, 2012 Series 2007-2 Class A & B Notes [Member]	Apr. 28, 2012 Unsecured Revolving Credit Facility [Member]	Apr. 28, 2012 Series 2007-A Variable Funding Note Facility [Member]	Apr. 28, 2012 Commercial Paper [Member]	Apr. 28, 2012 Short-Term Borrowings [Member]
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 502	$ 1	$ 500
Total short-term borrowing capacity							800
Current borrowing capacity					200	600
Unsecured revolving credit facilty, expiration date				June 2016	January 2013
Line of credit facility, amount outstanding				$ 0	$ 0	$ 0
Covenant terms				4
Covenant compliance				As of April 28, 2012, we were in compliance with this covenant