Financing Activities (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions	6 Months Ended
	Aug. 04, 2018	Jul. 29, 2017
Extinguishment of debt	$ 344	$ 247
Repayments of Debt	347	550
seven point four five senior debentures due 2017 [Member]
Extinguishment of debt	0	300
9.5% Amortizing Debentures due 2021
Extinguishment of debt	2	2
9.75% Amortizing Debentures Due 2021
Extinguishment of debt	1	1
6.375% Senior Notes Due 2037
Extinguishment of debt	43	135
6.9% senior debentures due 2032
Extinguishment of debt	5	72
6.7% Senior Debentures Due 2034
Extinguishment of debt	28	28
6.65% senior debentures due 2024
Extinguishment of debt	11	4
6.9% senior debentures due 2029
Extinguishment of debt	90	3
Four point five percent senior notes due two thousand thirty four[Member] [Member] [Member] [Member]
Extinguishment of debt	80	0
6.7% senior debentures due 2028
Extinguishment of debt	60	3
7.0% senior debentures due 2028
Extinguishment of debt	$ 27	$ 2