Cash, Cash Equivalents and Investments (Details) (USD $) In Millions, unless otherwise specified	Apr. 27, 2014		Oct. 27, 2013	Apr. 28, 2013	Oct. 28, 2012
Summary of Cash, Cash Equivalents and Investments
Cash	$ 691		$ 611
Cash equivalents:
Money market funds	1,762		1,095
Municipal securities			5
Total Cash equivalents	1,762		1,100
Total Cash and Cash equivalents	2,453		1,711	1,545	1,392
Short-term and long-term investments, Cost	946		1,149
Short-term and long-term investments, Gross Unrealized Gains	38		39
Short-term and long-term investments, Gross Unrealized Losses	2		3
Short-term and long-term investments, Estimated Fair Value	982		1,185
Equity investments in privately-held companies	77		76
Cash, Cash Equivalents and Investments, Cost	3,399		2,860
Cash, Cash Equivalents and Investments, Gross Unrealized Gains	38		39
Cash, Cash Equivalents and Investments, Gross Unrealized Losses	2		3
Cash, Cash Equivalents and Investments, Estimated Fair Value	3,435		2,896
Total fixed income securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	847		1,046
Short-term and long-term investments, Gross Unrealized Gains	4		6
Short-term and long-term investments, Gross Unrealized Losses	2		3
Short-term and long-term investments, Estimated Fair Value	849		1,049
U.S. Treasury and agency securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	68		170
Short-term and long-term investments, Gross Unrealized Gains	0		0
Short-term and long-term investments, Gross Unrealized Losses	0		0
Short-term and long-term investments, Estimated Fair Value	68		170
Non-US government securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	15	[1]	11
Short-term and long-term investments, Gross Unrealized Gains	0	[1]	0
Short-term and long-term investments, Gross Unrealized Losses	0	[1]	0
Short-term and long-term investments, Estimated Fair Value	15	[1]	11
Municipal securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	378		379
Short-term and long-term investments, Gross Unrealized Gains	2		2
Short-term and long-term investments, Gross Unrealized Losses	0		0
Short-term and long-term investments, Estimated Fair Value	380		381
Commercial paper, corporate bonds and medium-term notes [Member]
Cash equivalents:
Short-term and long-term investments, Cost	151		218
Short-term and long-term investments, Gross Unrealized Gains	1		2
Short-term and long-term investments, Gross Unrealized Losses	0		1
Short-term and long-term investments, Estimated Fair Value	152		219
Asset-backed and mortgage-backed securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	235		268
Short-term and long-term investments, Gross Unrealized Gains	1		2
Short-term and long-term investments, Gross Unrealized Losses	2		2
Short-term and long-term investments, Estimated Fair Value	234		268
Publicly traded equity securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	22		27
Short-term and long-term investments, Gross Unrealized Gains	34		33
Short-term and long-term investments, Gross Unrealized Losses	0		0
Short-term and long-term investments, Estimated Fair Value	$ 56		$ 60

[1] Includes agency debt securities guaranteed by non-U.S. governments, which consist of Germany and Canada.