Cash, Cash Equivalents and Investments (Details) (USD $) In Millions	May 01, 2011		Oct. 31, 2010
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	$ 4,540		$ 3,854
Cash, Cash Equivalents and Investments Gross Unrealized Gains	38		39
Cash, Cash Equivalents and Investments Gross Unrealized Losses	1		1
Cash, Cash Equivalents and Investments Estimated Fair Value	4,577		3,892
Total cash and cash equivalents [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	2,558		1,858
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	2,558		1,858
Cash [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	478		701
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	478		701
Money market funds [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,746		1,139
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	1,746		1,139
US commercial paper, corporate bonds and medium-term notes, cash equivalent [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	169
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	169
US Treasury and agency securities, cash equivalent [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	150
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	150
Obligations of states and political subdivisions, cash equivalent [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	15		18
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	15		18
Cash equivalents [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	2,080		1,157
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	2,080		1,157
U.S. Treasury and agency securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	543		665
Cash, Cash Equivalents and Investments Gross Unrealized Gains	3		8
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	546		673
Obligations of states and political subdivisions [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	516		500
Cash, Cash Equivalents and Investments Gross Unrealized Gains	3		5
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	519		505
U.S. commercial paper, corporate bonds and medium-term notes [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	456		502
Cash, Cash Equivalents and Investments Gross Unrealized Gains	4		7
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	460	[1]	509
Other debt securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	400	[2]	261	[2]
Cash, Cash Equivalents and Investments Gross Unrealized Gains	3	[2]	3	[2]
Cash, Cash Equivalents and Investments Gross Unrealized Losses	1	[2]	1	[2]
Cash, Cash Equivalents and Investments Estimated Fair Value	402	[2]	263	[2]
Total fixed income securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,915		1,928
Cash, Cash Equivalents and Investments Gross Unrealized Gains	13		23
Cash, Cash Equivalents and Investments Gross Unrealized Losses	1		1
Cash, Cash Equivalents and Investments Estimated Fair Value	1,927		1,950
Publicly traded equity securities [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	8		9
Cash, Cash Equivalents and Investments Gross Unrealized Gains	25		16
Cash, Cash Equivalents and Investments Gross Unrealized Losses	0		0
Cash, Cash Equivalents and Investments Estimated Fair Value	33		25
Equity investments in privately-held companies [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	59		59
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	59		59
Short-term and long-term investments: [Member]
Summary of Cash, Cash Equivalents and Investments
Cash, Cash Equivalents and Investments Cost	1,982		1,996
Cash, Cash Equivalents and Investments Gross Unrealized Gains	38		39
Cash, Cash Equivalents and Investments Gross Unrealized Losses	1		1
Cash, Cash Equivalents and Investments Estimated Fair Value	$ 2,019		$ 2,034

[1] Amounts as of May 1, 2011 are unaudited. Amounts as of October 31, 2010 are derived from the October 31, 2010 audited consolidated financial statements.

[2] Other debt securities consist primarily of investment grade asset-backed and mortgage-backed securities.