Financing (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Oct. 31, 2015	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Extinguishment of debt			$ 407
Debt repaid		$ 152	870	$ 124
7.875% Senior Notes Due 2015 [Member]
Extinguishment of debt		0	407	0
7.5% Senior Debentures Due 2015 [Member]
Extinguishment of debt				0
8.125% Senior Debentures Due 2035 [Member]
Extinguishment of debt	$ 76	76	0	0
7.5% Senior Debentures Due 2015 [Member]
Extinguishment of debt		69	0
Five point seven five percent senior notes due 2014[Member] [Member]
Extinguishment of debt		0	453	0
7.625% Senior Debentures Due 2013 [Member]
Extinguishment of debt		0	0	109
9.5% Amortizing Debentures Due 2021 [Member]
Extinguishment of debt		4	4	4
9.75% Amortizing Debentures Due 2021 [Member]
Extinguishment of debt		3	2	2
Capital Lease and Other Long-Term Obligations [Member]
Extinguishment of debt		$ 0	$ 4	$ 9