Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Apr. 28, 2019	Oct. 28, 2018
Contractual maturities of investments
Due in one year or less, Cost	$ 414
Due after one through five years, Cost	960
No single maturity date, Cost	708
Cost of short-term and long-term investments	2,082	$ 2,150
Due in one year or less, Estimated Fair Value	414
Due after one through five years, Estimated Fair Value	964
No single maturity date, Estimated Fair Value	738
Estimated fair value of short-term and long-term investments	$ 2,116	$ 2,158