Taxes (Reconciliation Of Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011
Balance, beginning of period	$ 205	$ 207
Additions based on tax positions related to the current year	23	19
Additions for tax positions of prior years	0	0
Reductions for tax positions of prior years	(21)	(8)
Settlements	(15)	(4)
Statute expirations	(13)	(9)
Balance, end of period	179	205
Other liabilities	18	11
Long-term deferred income taxes	27	24
Current income taxes	27	24
Unrecognized tax benefits	179	205
Other Liabilities [Member]
Long-term deferred income taxes	134	170
Current income taxes	$ 134	$ 170