Accounts Payable and Accrued Liabilities (Changes In Workers' Compensation And General Liability Reserves) (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]
Balance, beginning of year	$ 508	$ 505	$ 497
Expense for workers compensation and general liability reserves	145	159	160
Payments of workers compensation and general liability reserves	(150)	(156)	(152)
Balance, end of year	$ 503	$ 508	$ 505