Taxes (Tax Effects That Give Rise To Significant Portions Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014
Deferred tax assets:
Post employment and postretirement benefits	$ 586	$ 392
Accrued liabilities accounted for on a cash basis for tax purposes	320	289
Long-term debt	83	90
Unrecognized state tax benefits and accrued interest	76	84
State operating loss and credit carryforwards	80	79
Other	160	160
Valuation allowance	(24)	(23)
Total deferred tax assets	1,281	1,071
Deferred tax liabilities:
Excess of book basis over tax basis of property and equipment	(1,510)	(1,569)
Merchandise inventories	(585)	(587)
Intangible assets	(294)	(263)
Post employment benefits prepaid asset	0	(28)
Other	(335)	(297)
Total deferred tax liabilities	(2,724)	(2,744)
Net deferred tax liability	$ (1,443)	$ (1,673)