Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Jul. 29, 2018	Oct. 29, 2017
Contractual maturities of investments
Due in one year or less, Cost	$ 556
Due after one through five years, Cost	929
No single maturity date, Cost	688
Cost of short-term and long-term investments	2,173	$ 3,334
Due in one year or less, Estimated Fair Value	555
Due after one through five years, Estimated Fair Value	923
No single maturity date, Estimated Fair Value	745
Estimated fair value of short-term and long-term investments	$ 2,223	$ 3,409