Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Jul. 28, 2019	Oct. 28, 2018
Contractual maturities of investments
Due in one year or less, Cost	$ 467
Due after one through five years, Cost	951
No single maturity date, Cost	727
Cost of short-term and long-term investments	2,145	$ 2,150
Due in one year or less, Estimated Fair Value	468
Due after one through five years, Estimated Fair Value	959
No single maturity date, Estimated Fair Value	770
Estimated fair value of short-term and long-term investments	$ 2,197	$ 2,158