Accounts Payable and Accrued Liabilities (Changes In Workers' Compensation And General Liability Reserves) (Details) (USD $) In Millions, unless otherwise specified					12 Months Ended
	Jan. 28, 2012	Jan. 29, 2011	Jan. 30, 2010	Jan. 31, 2009	Jan. 28, 2012 Charged To Costs And Expenses [Member]	Jan. 29, 2011 Charged To Costs And Expenses [Member]	Jan. 30, 2010 Charged To Costs And Expenses [Member]	Jan. 28, 2012 Payments, Net Of Recoveries [Member]	Jan. 29, 2011 Payments, Net Of Recoveries [Member]	Jan. 30, 2010 Payments, Net Of Recoveries [Member]
Balance, beginning of year	$ 493	$ 488	$ 478	$ 495
Increase (decrease) in workers' compensation liabilities					144	148	124	(139)	(138)	(141)
Balance, end of year	$ 493	$ 488	$ 478	$ 495