Financing Activities - Detail Of Debt Repayments (Details) - USD ($) $ in Millions	9 Months Ended
	Oct. 31, 2020	Nov. 02, 2019
Repayments of Debt	$ 1,506	$ 42
9.5% Amortizing debentures due 2021
Interest rate stated percentage		9.50%
Repayments of Debt	4	$ 4
9.75% Amortizing Debentures due 2021
Interest rate stated percentage		9.75%
Repayments of Debt	2	$ 2
Line of Credit
Repayments of Debt	1,500	$ 0
8.5% Amortizing debentures due 2019
Interest rate stated percentage		8.50%
Repayments of Debt	$ 0	$ 36