Fair Value Measurements (Details Textual)	Jul. 26, 2013 6.0% Senior Notes due 2016	Oct. 26, 2012 6.0% Senior Notes due 2016	Nov. 01, 2006 6.0% Senior Notes due 2016	Jul. 26, 2013 5.125% Senior Notes due 2021	Oct. 26, 2012 5.125% Senior Notes due 2021	Oct. 12, 2011 5.125% Senior Notes due 2021	Jul. 26, 2013 6.625% Senior Notes due 2036	Oct. 26, 2012 6.625% Senior Notes due 2036	Nov. 01, 2006 6.625% Senior Notes due 2036
Debt Instrument [Line Items]
Interest rate	6.00%	6.00%	6.00%	5.125%	5.125%	5.125%	6.625%	6.625%	6.625%