Financing Activities (Detail Of Debt Repayments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 31, 2021	Aug. 01, 2020
Repayments of Debt	$ 517	$ 1,503
Revolving Credit Agreement [Member]
Repayments of Debt	0	1,500
9.5% Amortizing Debentures Due 2021 [Member]
Repayments of Debt	$ 2	$ 2
Debt instrument interest rate, stated percentage	9.50%	9.50%
9.75% Amortizing Debentures Due 2021 [Member]
Repayments of Debt	$ 1	$ 1
Debt instrument interest rate, stated percentage	9.75%	9.75%
3.875% Senior Notes Due 2022 [Member]
Repayments of Debt	$ 156	$ 0
Debt instrument interest rate, stated percentage	3.875%	3.875%
2.875% Senior Notes Due 2023 [Member]
Repayments of Debt	$ 136	$ 0
Debt instrument interest rate, stated percentage	2.875%	2.875%
4.375% Senior Notes Due 2023 [Member]
Repayments of Debt	$ 49	$ 0
Debt instrument interest rate, stated percentage	4.375%	4.375%
3.625% Senior Notes Due 2024 [Member]
Repayments of Debt	$ 150	$ 0
Debt instrument interest rate, stated percentage	3.625%	3.625%
6.65% Senior Debentures Due 2024 [Member]
Repayments of Debt	$ 4	$ 0
Debt instrument interest rate, stated percentage	6.65%	6.65%
7.6% Senior Debentures Due 2025 [Member]
Repayments of Debt	$ 19	$ 0
Debt instrument interest rate, stated percentage	7.60%	7.60%