Summary of Significant Accounting Policies (Details)	3 Months Ended												12 Months Ended
	Oct. 26, 2014	Jul. 27, 2014	Apr. 27, 2014	Jan. 26, 2014	Oct. 27, 2013	Jul. 28, 2013	Apr. 28, 2013	Jan. 27, 2013	Oct. 28, 2012	Jul. 29, 2012	Apr. 29, 2012	Jan. 29, 2012	Oct. 26, 2014	Oct. 27, 2013	Oct. 28, 2012
Property, Plant and Equipment [Line Items]
Operating cycle	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	91 days	364 days	364 days	364 days
Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Life													1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Life													15 years
Building and improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													3 years
Building and improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													30 years
Demonstration and manufacturing equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													3 years
Demonstration and manufacturing equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													5 years
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													3 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													5 years
Furniture, fixtures and other equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													3 years
Furniture, fixtures and other equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, useful life													15 years
Land improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Term of amortization													15 years
Leasehold improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Term of amortization													5 years