Cash, Cash Equivalents and Investments - Summary of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Jan. 26, 2020	Oct. 27, 2019
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,370	$ 1,071
Total Cash equivalents	2,054	2,058
Total Cash and Cash equivalents	3,424	3,129
Equity investments cost	114	113
Equity investments unrealized gain	49	50
Equity investments unrealized loss	7	6
Equity investments estimated fair value	156	157
Total short-term and long-term investments cost	2,191	2,134
Gross unrealized gains on short-term and long-term investments	65	64
Gross unrealized losses on short-term and long-term investments	7	6
Estimated fair value of short-term and long-term investments	2,249	2,192
Cash, cash equivalents and investments, cost	5,615	5,263
Cash, cash equivalents and investments, gross unrealized gains	65	64
Cash, cash equivalents and investments, gross unrealized losses	7	6
Cash, cash equivalents and investments, estimated fair value	5,673	5,321
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	2,077	2,021
Gross unrealized gains on fixed income securities	16	14
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	2,093	2,035
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	330	336
Gross unrealized gains on fixed income securities	2	1
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	332	337
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	397	402
Gross unrealized gains on fixed income securities	5	4
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	402	406
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	698	642
Gross unrealized gains on fixed income securities	5	5
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	703	647
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	648	631
Gross unrealized gains on fixed income securities	4	4
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	652	635
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	8	8
Equity investments unrealized gain	39	40
Equity investments unrealized loss	3	3
Equity investments estimated fair value	44	45
Equity investments in privately-held companies
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	106	105
Equity investments unrealized gain	10	10
Equity investments unrealized loss	4	3
Equity investments estimated fair value	112	112
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	1,644	1,677
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	2	4
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	407	377
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	1
CANADA | Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	4	10
Gross unrealized gains on fixed income securities	0	0
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	$ 4	$ 10