Cash, Cash Equivalents and Investments (Summary of Cash, Cash Equivalents and Investments) (Details) - USD ($) $ in Millions	Jul. 28, 2019	Oct. 28, 2018
Summary of Cash, Cash Equivalents and Investments
Cash	$ 918	$ 1,489
Total Cash equivalents	2,096	1,951
Total Cash and Cash equivalents	3,014	3,440
Equity investments cost	113
Equity investments unrealized gain	46
Equity investments unrealized loss	6
Equity investments estimated fair value	153
Total short-term and long-term investments cost	2,145
Gross unrealized gains on short-term and long-term investments	59
Gross unrealized losses on short-term and long-term investments	7
Estimated fair value of short-term and long-term investments	2,197
Gross unrealized gain on publicly traded equity securities		25
Gross unrealized loss on publicly traded equity securities		4
Equity investments in privately-held companies		89
Cost of equity investments		106
Estimated fair value of equity investments		127
Cost of short-term and long-term investments	2,145	2,150
Gross unrealized gain on short term and long term investments		25
Gross unrealized loss on short term and long term investments		17
Estimated fair value of short-term and long-term investments	2,197	2,158
Cash, cash equivalents and investments, cost	5,159	5,590
Cash, cash equivalents and investments, gross unrealized gains	59	25
Cash, cash equivalents and investments, gross unrealized losses	7	17
Cash, cash equivalents and investments, estimated fair value	5,211	5,598
Total fixed income securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	2,032	2,044
Gross unrealized gains on fixed income securities	13	0
Gross unrealized losses on fixed income securities	1	13
Estimated fair value of fixed income securities	2,044	2,031
U.S. Treasury and agency securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	343	335
Gross unrealized gains on fixed income securities	2	0
Gross unrealized losses on fixed income securities	0	2
Estimated fair value of fixed income securities	345	333
Municipal securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	390	399
Gross unrealized gains on fixed income securities	4	0
Gross unrealized losses on fixed income securities	0	4
Estimated fair value of fixed income securities	394	395
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	676	705
Gross unrealized gains on fixed income securities	4	0
Gross unrealized losses on fixed income securities	0	3
Estimated fair value of fixed income securities	680	702
Asset-backed and mortgage-backed securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	614	595
Gross unrealized gains on fixed income securities	3	0
Gross unrealized losses on fixed income securities	1	4
Estimated fair value of fixed income securities	616	591
Publicly traded equity securities
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	8
Equity investments unrealized gain	37
Equity investments unrealized loss	3
Equity investments estimated fair value	42
Publicly traded equity securities cost		17
Gross unrealized gain on publicly traded equity securities		25
Gross unrealized loss on publicly traded equity securities		4
Publicly traded equity securities estimated fair value		38
Equity investments in privately-held companies
Summary of Cash, Cash Equivalents and Investments
Equity investments cost	105
Equity investments unrealized gain	9
Equity investments unrealized loss	3
Equity investments estimated fair value	111
Money market funds
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	2,010	1,599
Commercial paper, corporate bonds and medium-term notes
Summary of Cash, Cash Equivalents and Investments
Total Cash equivalents	86	352
CANADA | Non-U.S. government securities
Summary of Cash, Cash Equivalents and Investments
Cost of fixed income securities	9	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	$ 9	$ 10