Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Jan. 27, 2019	Oct. 28, 2018
Contractual maturities of investments
Due in one year or less, Cost	$ 429
Due after one through five years, Cost	985
No single maturity date, Cost	684
Cost of short-term and long-term investments	2,098	$ 2,150
Due in one year or less, Estimated Fair Value	428
Due after one through five years, Estimated Fair Value	983
No single maturity date, Estimated Fair Value	697
Estimated fair value of short-term and long-term investments	$ 2,108	$ 2,158