Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	May. 01, 2016	Oct. 25, 2015
Contractual maturities of investments
Due in one year or less, Cost	$ 152
Due after one through five years, Cost	561
No single maturity date, Cost	367
Short-term and long-term investments, Cost	1,080	$ 1,095
Due in one year or less, Estimated Fair Value	152
Due after one through five years, Estimated Fair Value	563
No single maturity date, Estimated Fair Value	389
Investments maturities, Estimated Fair Value	$ 1,104	$ 1,114