Financing (Detail Of Debt Repayments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010
Debt repaid	$ 454	$ 1,245	$ 966
5.875% Senior Notes Due 2013 [Member]
Extinguishment of debt	0	52	0
7.625% Senior Debentures Due 2013 [Member]
Extinguishment of debt	0	16	0
5.75% Senior Notes Due 2014 [Member]
Extinguishment of debt	0	47	0
7.875% Senior Notes Due 2015 [Member]
Extinguishment of debt	0	38	0
5.90% Senior Notes Due 2016 [Member]
Extinguishment of debt	0	123	0
7.45% Senior Debentures Due 2016 [Member]
Extinguishment of debt	0	2	0
9.5% Amortizing Debentures Due 2021 [Member]
Extinguishment of debt	4	4	4
9.75% Amortizing Debentures Due 2021 [Member]
Extinguishment of debt	2	2	2
Capital Lease and Other Long-Term Obligations [Member]
Extinguishment of debt	9	13	10
6.625% Senior Notes Due 2011 [Member]
Extinguishment of debt	330	170	0
7.45% Senior Debentures Due 2011 [Member]
Extinguishment of debt	109	41	0
5.35% Senior Notes Due 2012 [Member]
Extinguishment of debt	0	484	0
8.0% Senior Debentures Due 2012 [Member]
Extinguishment of debt	0	27	0
10.625% Senior Debentures Due 2010 [Member]
Extinguishment of debt	0	150	0
8.5% Senior Notes Due 2010 [Member]
Extinguishment of debt	0	76	0
4.8% Senior Notes Due 2009 [Member]
Extinguishment of debt	0	0	600
6.3% Senior Notes Due 2009 [Member]
Extinguishment of debt	$ 0	$ 0	$ 350