Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Millions	Jan. 29, 2017	Oct. 30, 2016	Jan. 31, 2016	Oct. 25, 2015
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,322	$ 1,103
Total Cash equivalents	2,169	2,303
Total Cash and Cash equivalents	3,491	3,406	$ 2,962	$ 4,797
Short-term and long-term investments, Cost	1,523	1,230
Gross Unrealized Gains	47	46
Gross Unrealized Losses	5	4
Estimated Fair Value	1,565	1,272
Equity investments in privately-held companies	64	70
Cash, cash equivalents and investments, cost	5,014	4,636
Cash, cash equivalents and investments, gross unrealized gains	47	46
Cash, cash equivalents and investments, gross unrealized losses	5	4
Cash, cash equivalents and investments, estimated fair value	5,056	4,678
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	1,433	1,134
Gross Unrealized Gains	0	2
Gross Unrealized Losses	4	1
Estimated Fair Value	1,429	1,135
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	103	195
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1	0
Estimated Fair Value	102	195
Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	35	5
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	35	5
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	560	408
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1	0
Estimated Fair Value	559	408
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	470	273
Gross Unrealized Gains	0	1
Gross Unrealized Losses	1	0
Estimated Fair Value	469	274
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	265	253
Gross Unrealized Gains	0	1
Gross Unrealized Losses	1	1
Estimated Fair Value	264	253
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	26	26
Gross Unrealized Gains	47	44
Gross Unrealized Losses	1	3
Estimated Fair Value	72	67
Equity investments in privately-held companies
Summary of Cash, Cash Equivalents and Investments
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	1,533	1,889
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	50	10
Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	31	10
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	210	253
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	$ 345	$ 141