Goodwill and Intangible Assets (Details) (USD $)	3 Months Ended			12 Months Ended
	Oct. 25, 2014	Oct. 26, 2013	Jul. 26, 2014	Jul. 26, 2014 Goodwill	Jul. 26, 2014 Minimum Goodwill	Jul. 26, 2014 Maximum Goodwill	Jul. 26, 2014 Businesses Acquired in Fiscal 2013 reporting_unit	Jul. 26, 2014 First Reporting Unit Acquired in Fiscal 2013	Jul. 26, 2014 Second Reporting Unit Acquired in Fiscal 2013	Jul. 26, 2014 Third Reporting Unit Acquired in Fiscal 2013	Oct. 25, 2014 Hewitt Power & Communications, Inc
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Goodwill	$ 269,465,000		$ 269,088,000					$ 10,600,000	$ 4,800,000	$ 3,600,000
Reporting units as a percent of consolidated goodwill balance				20.00%
Discount rate				11.50%
Terminal growth rate range					1.50%	3.00%
Fair value assumptions, expected term				7 years
Number of Reporting Units that Exceeded Carrying Value							3
Excess carrying value, percent							25.00%
Carrying amount											5,800,000
Amortization expense for finite-lived intangible assets	$ 4,100,000	$ 5,200,000