Financing Activities (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Feb. 03, 2018	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Extinguishment of debt				$ 247
Extinguishment of debt cost		$ 257		257
Net premiums on early retirement of debt		$ 0	$ 0	1	$ 0
7.45% senior debentures due 2017
Extinguishment of debt				$ 300	$ 0
Debt Instrument, Interest Rate, Stated Percentage		7.45%		7.45%
Subsequent Event [Member]
Extinguishment of debt	$ 400
Minimum [Member] | Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage	6.38%
Maximum [Member] | Subsequent Event [Member]
Debt Instrument, Interest Rate, Stated Percentage	10.25%