Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Millions	Jul. 30, 2017	Oct. 30, 2016	Jul. 31, 2016	Oct. 25, 2015
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,123	$ 1,103
Total Cash equivalents	4,155	2,303
Total Cash and Cash equivalents	5,278	3,406	$ 2,828	$ 4,797
Short-term and long-term investments, Cost	2,936	1,230
Equity investments in privately-held companies	76	70
Gross Unrealized Gains	77	46
Gross Unrealized Losses	1	4
Estimated Fair Value	3,012	1,272
Cash, cash equivalents and investments, cost	8,214	4,636
Cash, cash equivalents and investments, gross unrealized gains	77	46
Cash, cash equivalents and investments, gross unrealized losses	1	4
Cash, cash equivalents and investments, estimated fair value	8,290	4,678
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	2,836	1,134
Gross Unrealized Gains	1	2
Gross Unrealized Losses	1	1
Estimated Fair Value	2,836	1,135
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	628	195
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1	0
Estimated Fair Value	627	195
Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	159	5
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	159	5
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	893	408
Gross Unrealized Gains	1	0
Gross Unrealized Losses	0	0
Estimated Fair Value	894	408
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	840	273
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Estimated Fair Value	840	274
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	316	253
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	1
Estimated Fair Value	316	253
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	24	26
Gross Unrealized Gains	76	44
Gross Unrealized Losses	0	3
Estimated Fair Value	100	67
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	3,055	1,889
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents		10
Non-U.S. Government Corporations and Agencies Securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents		10
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	437	253
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	$ 663	$ 141