Financing Activities (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Feb. 02, 2019	Nov. 03, 2018	Oct. 28, 2017	Nov. 03, 2018	Oct. 28, 2017
Extinguishment of debt				$ 344	$ 247
Extinguishment of debt cost		$ 354	$ 257	354	257
Loss on early retirement of debt		$ 0	$ 0	(5)	(1)
7.45% senior debentures due 2017
Extinguishment of debt				$ 0	$ 300
Subsequent Event [Member]
Extinguishment of debt	$ 600
Minimum [Member] | Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage	2.875%
Maximum [Member] | Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage	8.75%