Cash, Cash Equivalents and Investments - Summary of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Oct. 31, 2021	Oct. 25, 2020	Oct. 27, 2019
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,407	$ 1,136
Total Cash equivalents	3,588	4,215
Total Cash and Cash equivalents	4,995	5,351	$ 3,129
Cost of fixed income securities	2,411
Estimated fair value of fixed income securities	5,526	6,071
Equity investments cost	583	132
Equity investments unrealized gain	121	61
Publicly traded equity securities, gross unrealized losses	17	9
Equity investments estimated fair value	687	184
Total short-term and long-term investments cost	2,411	1,847
Total short-term and long-term investments, gross unrealized gains	129	88
Total short-term and long-term investments, gross unrealized losses	21	10
Total short-term and long-term investments	2,519	1,925
Cash, cash equivalents and investments, cost	7,406	7,198
Cash, cash equivalents and investments, gross unrealized gains	129	88
Cash, cash equivalents and investments, gross unrealized losses	21	10
Cash, cash equivalents and investments, estimated fair value	7,514	7,276
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	1,828	1,715
Gross unrealized gains on fixed income securities	8	27
Gross unrealized losses on fixed income securities	4	1
Estimated fair value of fixed income securities	1,832	1,741
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	314	394
Gross unrealized gains on fixed income securities	0	4
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	314	398
Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	5
Gross unrealized gains on fixed income securities	0
Gross unrealized losses on fixed income securities	0
Estimated fair value of fixed income securities	5
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	367	359
Gross unrealized gains on fixed income securities	3	6
Gross unrealized losses on fixed income securities	1	0
Estimated fair value of fixed income securities	369	365
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	587	492
Gross unrealized gains on fixed income securities	2	8
Gross unrealized losses on fixed income securities	2	1
Estimated fair value of fixed income securities	587	499
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	555	470
Gross unrealized gains on fixed income securities	3	9
Gross unrealized losses on fixed income securities	1	0
Estimated fair value of fixed income securities	557	479
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	22	11
Equity investments unrealized gain	39	36
Publicly traded equity securities, gross unrealized losses	3	2
Equity investments estimated fair value	58	45
Equity investments in privately-held companies
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	561	121
Equity investments unrealized gain	82	25
Publicly traded equity securities, gross unrealized losses	14	7
Equity investments estimated fair value	629	139
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	3,556	4,209
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	22	$ 6
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	$ 10