Cash, Cash Equivalents and Investments (Contractual Maturities) (Details) - USD ($) $ in Millions	Oct. 28, 2018	Oct. 29, 2017
Cash and Cash Equivalents [Abstract]
Due in one year or less, cost	$ 503
Due after one through five years, cost	946
No single maturity date, cost	701
Cost of short-term and long-term investments	2,150	$ 3,334
Due in one year or less, estimated fair value	502
Due after one through five years, estimated fair value	938
No single maturity date, estimated fair value	718
Estimated fair value of short-term and long-term investments	$ 2,158	$ 3,409