Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Jan. 28, 2018	Oct. 29, 2017
Contractual maturities of investments
Due in one year or less, Cost	$ 606
Due after one through five years, Cost	674
No single maturity date, Cost	494
Short-term and long-term investments, Cost	1,774	$ 3,334
Due in one year or less, Estimated Fair Value	606
Due after one through five years, Estimated Fair Value	668
No single maturity date, Estimated Fair Value	584
Investments maturities, Estimated Fair Value	$ 1,858	$ 3,409