Debt (Details) - USD ($) $ in Millions	3 Months Ended
	Oct. 28, 2018	Jan. 28, 2018
Debt Instrument
Unamortized debt discount and issuance costs	$ (13)	$ (15)
Net carrying amount	$ 1,987	1,985
2.20% Notes Due 2021
Debt Instrument
Expected Remaining Term (years)	2 years 10 months 24 days
Effective interest rate (as percent)	2.38%
Long-term debt, gross	$ 1,000	1,000
3.20% Notes Due 2026
Debt Instrument
Expected Remaining Term (years)	7 years 10 months 24 days
Effective interest rate (as percent)	3.31%
Long-term debt, gross	$ 1,000	$ 1,000