Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Millions	Jan. 28, 2018	Oct. 29, 2017	Jan. 29, 2017	Oct. 30, 2016
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,469	$ 1,346
Total Cash equivalents	5,330	3,664
Total Cash and Cash equivalents	6,799	5,010	$ 3,491	$ 3,406
Short-term and long-term investments, Cost	1,774	3,334
Equity investments in privately-held companies	75	74
Gross Unrealized Gains	93	79
Gross Unrealized Losses	9	4
Estimated Fair Value	1,858	3,409
Cash, cash equivalents and investments, cost	8,573	8,344
Cash, cash equivalents and investments, gross unrealized gains	93	79
Cash, cash equivalents and investments, gross unrealized losses	9	4
Cash, cash equivalents and investments, estimated fair value	8,657	8,419
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	1,677	3,238
Gross Unrealized Gains	0	1
Gross Unrealized Losses	8	3
Estimated Fair Value	1,669	3,236
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	255	667
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1	1
Estimated Fair Value	254	666
Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	10	161
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	10	161
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	452	1,007
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2	0
Estimated Fair Value	450	1,007
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	563	1,024
Gross Unrealized Gains	0	1
Gross Unrealized Losses	2	1
Estimated Fair Value	561	1,024
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	397	379
Gross Unrealized Gains	0	0
Gross Unrealized Losses	3	1
Estimated Fair Value	394	378
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Short-term and long-term investments, Cost	22	22
Gross Unrealized Gains	93	78
Gross Unrealized Losses	1	1
Estimated Fair Value	114	99
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	3,766	2,658
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents		15
Non-U.S. Government Corporations and Agencies Securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	40	55
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	836	341
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	$ 688	$ 595