Financing (Detail Of Debt Repayments) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jul. 30, 2011	Jul. 31, 2010
Debt repaid	$ 337	$ 584
8.5% Senior Notes Due 2010 [Member]
Debt repaid	0	76
Debt instrument interest rate	8.50%	8.50%
Debt instrument maturity year	2010
6.625% Senior Notes Due 2011 [Member]
Debt repaid	330	57
Debt instrument interest rate	6.625%	6.625%
Debt instrument maturity year	2011
7.45% Senior Debentures Due 2011 [Member]
Debt repaid	0	9
Debt instrument interest rate	7.45%	7.45%
Debt instrument maturity year	2011
5.35% Senior Notes Due 2012 [Member]
Debt repaid	0	425
Debt instrument interest rate	5.35%	5.35%
Debt instrument maturity year	2012
8.0% Senior Debentures Due 2012 [Member]
Debt repaid	0	9
Debt instrument interest rate	8.00%	8.00%
Debt instrument maturity year	2012
9.5% Amortizing Debentures Due 2021 [Member]
Debt repaid	2	2
Debt instrument interest rate	9.50%	9.50%
Debt instrument maturity year	2021
9.75% Amortizing Debentures Due 2021 [Member]
Debt repaid	1	1
Debt instrument interest rate	9.75%	9.75%
Debt instrument maturity year	2021
Capital Leases And Other Obligations [Member]
Debt repaid	$ 4	$ 5