Cash, Cash Equivalents and Investments - Summary of Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Millions	Aug. 01, 2021	Oct. 25, 2020	Jul. 26, 2020
Summary of Cash, Cash Equivalents and Investments
Cash	$ 1,236	$ 1,136
Total Cash equivalents	4,830	4,215
Total Cash and Cash equivalents	6,066	5,351	$ 4,350
Equity investments cost	172	132
Equity investments unrealized gain	115	61
Equity investments unrealized loss	16	9
Equity investments estimated fair value	271	184
Total short-term and long-term investments cost	1,989	1,847
Gross unrealized gains on short-term and long-term investments	129	88
Gross unrealized losses on short-term and long-term investments	16	10
Estimated fair value of short-term and long-term investments	2,102	1,925
Cash, cash equivalents and investments, cost	8,055	7,198
Cash, cash equivalents and investments, gross unrealized gains	129	88
Cash, cash equivalents and investments, gross unrealized losses	16	10
Cash, cash equivalents and investments, estimated fair value	8,168	7,276
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	1,817	1,715
Gross unrealized gains on fixed income securities	14	27
Gross unrealized losses on fixed income securities	0	1
Estimated fair value of fixed income securities	1,831	1,741
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	347	394
Gross unrealized gains on fixed income securities	1	4
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	348	398
Non-U.S. government securities | CANADA
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	6
Gross unrealized gains on fixed income securities	0
Gross unrealized losses on fixed income securities	0
Estimated fair value of fixed income securities	6
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	352	359
Gross unrealized gains on fixed income securities	5	6
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	357	365
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	580	492
Gross unrealized gains on fixed income securities	3	8
Gross unrealized losses on fixed income securities	0	1
Estimated fair value of fixed income securities	583	499
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	532	470
Gross unrealized gains on fixed income securities	5	9
Gross unrealized losses on fixed income securities	0	0
Estimated fair value of fixed income securities	537	479
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	19	11
Equity investments unrealized gain	44	36
Equity investments unrealized loss	2	2
Equity investments estimated fair value	61	45
Equity investments in privately-held companies
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	153	121
Equity investments unrealized gain	71	25
Equity investments unrealized loss	14	7
Equity investments estimated fair value	210	139
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	4,796	4,209
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	12
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	10	$ 6
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	$ 12