Taxes (Tax Effects That Give Rise To Significant Portions Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions	Jan. 28, 2017	Jan. 30, 2016
Deferred tax assets:
Post employment and postretirement benefits	$ 405	$ 536
Accrued liabilities accounted for on a cash basis for tax purposes	379	340
Long-term debt	63	73
Unrecognized state tax benefits and accrued interest	76	79
State operating loss and credit carryforwards	79	82
Other	347	206
Valuation allowance	(36)	(27)
Total deferred tax assets	1,313	1,289
Deferred tax liabilities:
Excess of book basis over tax basis of property and equipment	(1,381)	(1,485)
Merchandise inventories	(604)	(606)
Intangible assets	(380)	(345)
Other	(391)	(330)
Total deferred tax liabilities	(2,756)	(2,766)
Net deferred tax liability	$ (1,443)	$ (1,477)