Restructuring Charges and Asset Impairments (Details Textuals) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended	0 Months Ended		3 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	0 Months Ended				0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended		3 Months Ended
	Jan. 27, 2013	Jan. 29, 2012	Oct. 28, 2012	Jan. 27, 2013 2012 Global Restructuring Plan [Member]	Oct. 03, 2012 2012 Global Restructuring Plan [Member] Minimum [Member] positions	Oct. 03, 2012 2012 Global Restructuring Plan [Member] Maximum [Member] positions	Jan. 27, 2013 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member]		Oct. 28, 2012 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member]	Jan. 27, 2013 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member] Minimum [Member]	Oct. 28, 2012 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member] Minimum [Member]	Jan. 27, 2013 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member] Maximum [Member]	Oct. 28, 2012 2012 Global Restructuring Plan [Member] Severance and other employee-related costs [Member] Maximum [Member]	Jan. 27, 2013 2012 EES Restructuring Plan [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Minimum [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Maximum [Member] positions	Jan. 27, 2013 2012 EES Restructuring Plan [Member] Severance and other employee-related costs [Member]	Oct. 28, 2012 2012 EES Restructuring Plan [Member] Severance and other employee-related costs [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Severance and other employee-related costs [Member] Maximum [Member]	Jan. 27, 2013 2012 EES Restructuring Plan [Member] Asset Impairments [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Asset Impairments [Member] Maximum [Member]	Jan. 27, 2013 2012 EES Restructuring Plan [Member] Inventory-related charges [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Inventory-related charges [Member] Maximum [Member]	May 10, 2012 2012 EES Restructuring Plan [Member] Lease termination and other obligations [Member] Maximum [Member]	Jan. 27, 2013 Others [Member] Severance and other employee-related costs [Member]	Oct. 28, 2012 Others [Member] Severance and other employee-related costs [Member]
Restructuring and Asset Impairments (Textuals) [Abstract]
Reduction in Global Workforce (in positions)					900	1,300										250
Reduction in Global Workforce in percent					6.00%	9.00%
Expected restructuring charges										$ 120	$ 180	$ 160	$ 230		$ 70	$ 100			$ 40		$ 30		$ 15	$ 15
Restructuring charges and asset impairments	9	0					4	[1]												3					2
Costs incurred to date				110										64								13
Term of restructuring plan (in months)															12 months	18 months
Assets impairment charges														3
Restructuring reserve	$ 73		$ 133				$ 54		$ 106								$ 10	$ 16							$ 3	$ 5

[1] Consisted primarily of share-based compensation expense which was recorded in additional paid-in capital.