Cash, Cash Equivalents and Investments (Details) (USD $) In Millions, unless otherwise specified	Jul. 28, 2013		Oct. 28, 2012	Jul. 29, 2012	Oct. 30, 2011
Summary of Cash, Cash Equivalents and Investments
Cash	$ 600		$ 876
Cash equivalents:
Money market funds	1,145		483
Municipal securities			33
Total Cash equivalents	1,145		516
Total Cash and Cash equivalents	1,745		1,392	1,529	5,960
Short-term and long-term investments, Cost	1,257		1,575
Short-term and long-term investments, Gross Unrealized Gains	33		25
Short-term and long-term investments, Gross Unrealized Losses	5		0
Short-term and long-term investments, Estimated Fair Value	1,285		1,600
Equity investments in privately-held companies	71		70
Cash, Cash Equivalents and Investments, Cost	3,002		2,967
Cash, Cash Equivalents and Investments, Gross Unrealized Gains	33		25
Cash, Cash Equivalents and Investments, Gross Unrealized Losses	5		0
Cash, Cash Equivalents and Investments, Estimated Fair Value	3,030		2,992
Total fixed income securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	1,156		1,473
Short-term and long-term investments, Gross Unrealized Gains	6		10
Short-term and long-term investments, Gross Unrealized Losses	5		0
Short-term and long-term investments, Estimated Fair Value	1,157		1,483
U.S. Treasury and agency securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	229		373
Short-term and long-term investments, Gross Unrealized Gains	1		1
Short-term and long-term investments, Gross Unrealized Losses	1		0
Short-term and long-term investments, Estimated Fair Value	229		374
Non-US government securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	11	[1]	29
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	11	[1]	29
Municipal securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	378		396
Short-term and long-term investments, Gross Unrealized Gains	1		2
Short-term and long-term investments, Gross Unrealized Losses	1		0
Short-term and long-term investments, Estimated Fair Value	378		398
Commercial paper, corporate bonds and medium-term notes [Member]
Cash equivalents:
Short-term and long-term investments, Cost	257		381
Short-term and long-term investments, Gross Unrealized Gains	2		3
Short-term and long-term investments, Gross Unrealized Losses	1		0
Short-term and long-term investments, Estimated Fair Value	258		384
Asset-backed and mortgage-backed securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	281		294
Short-term and long-term investments, Gross Unrealized Gains	2		4
Short-term and long-term investments, Gross Unrealized Losses	2		0
Short-term and long-term investments, Estimated Fair Value	281		298
Publicly traded equity securities [Member]
Cash equivalents:
Short-term and long-term investments, Cost	30		32
Short-term and long-term investments, Gross Unrealized Gains	27		15
Short-term and long-term investments, Gross Unrealized Losses	0		0
Short-term and long-term investments, Estimated Fair Value	$ 57		$ 47

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