Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Aug. 04, 2018	May 05, 2018	Feb. 03, 2018	Jul. 29, 2017	Aug. 04, 2018	Jul. 29, 2017	Feb. 03, 2018
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	23.50%			38.30%	24.10%	38.80%
Benefit To Income Taxes If Decrease In Gross Unrecognized Tax Benefits Within 12 Months Are Recognized					$ 0
U.S. federal statutory tax rate							35.00%
U.S. Federal Statutory Tax Rate after Tax Cuts and Jobs Act					21.00%
Other Tax Expense (Benefit)			$ 57
Measurement Period Adjustments to Provisional Estimated Net Change	$ 0	$ 0