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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 |  |  |  |  |  |  |  |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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