Cash, Cash Equivalents and Investments (Details) (USD $) In Millions, unless otherwise specified	Jan. 27, 2013		Oct. 28, 2012
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	$ 2,790		$ 2,967
Cash, Cash Equivalents and Investments Gross Unrealized Gains	25		25
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	2,815		2,992
Total cash and cash equivalents [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,523		1,392
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0		0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	1,523		1,392
Cash [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	709		876
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0		0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	709		876
Cash equivalents [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	814		516
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0		0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	814		516
Cash equivalents [Member] | Money market funds [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	814		483
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0		0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	814		483
Cash equivalents [Member] | Municipal securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost			33
Cash, Cash Equivalents and Investments Gross Unrealized Gains			0
Cash, Cash Equivalents and Investments Gross Unrealized Losses			0
Cash, Cash Equivalents and Investments Estimated Fair Value			33
Short-term and long-term investments [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,267		1,575
Cash, Cash Equivalents and Investments Gross Unrealized Gains	25		25
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	1,292		1,600
Short-term and long-term investments [Member] | Total fixed income securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,165		1,473
Cash, Cash Equivalents and Investments Gross Unrealized Gains	9		10
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	1,174		1,483
Short-term and long-term investments [Member] | U.S. Treasury and agency securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	210		373
Cash, Cash Equivalents and Investments Gross Unrealized Gains	1		1
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	211		374
Short-term and long-term investments [Member] | Non-US government securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	13	[1]	29
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0	[1]	0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0	[1]	0
Cash, Cash Equivalents and Investments Estimated Fair Value	13	[1]	29
Short-term and long-term investments [Member] | Municipal securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	389		396
Cash, Cash Equivalents and Investments Gross Unrealized Gains	2		2
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	391		398
Short-term and long-term investments [Member] | Commercial paper, corporate bonds and medium-term notes [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	270		381
Cash, Cash Equivalents and Investments Gross Unrealized Gains	3		3
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	273		384
Short-term and long-term investments [Member] | Asset-backed and mortgage-backed securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	283		294
Cash, Cash Equivalents and Investments Gross Unrealized Gains	3		4
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	286		298
Short-term and long-term investments [Member] | Publicly traded equity securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	30		32
Cash, Cash Equivalents and Investments Gross Unrealized Gains	16		15
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	46		47
Short-term and long-term investments [Member] | Equity investments in privately-held companies [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	72		70
Cash, Cash Equivalents and Investments Gross Unrealized Gains	0		0
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	$ 72		$ 70

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