Debt And Credit Facilities (Schedule Of Interest Expense, Net) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Debt And Credit Facilities [Abstract]
Interest on long-term debt and short-term borrowings	$ 139	$ 133	$ 148
Interest income	(2)	(1)	(3)
Capitalized interest	(7)	(5)	(7)
Interest expense, net	$ 130	$ 127	$ 138