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Business Combinations Business Combinations - 2015 Acquisitions (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2015 | Oct. 31, 2014 | Oct. 31, 2013
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 2,471,241 | [1] | $ 2,255,708 | $ 1,975,971
Series of Individually Immaterial Business Acquisitions [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Acquisition-related costs | 14,900 |  |  |
Payments to Acquire Businesses, Net of Cash Acquired | 333,200 |  |  |
Goodwill | 234,000 |  |  |
Business Acquisition, Goodwill, Expected Tax Deductible Amount | 2,300 |  |  |
Identifiable intangibles assets acquired | 119,800 |  |  |
Fair value of stock options assumed | $ 2,100 |  |  |
Minimum | Series of Individually Immaterial Business Acquisitions [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period | 1 year |  |  |
Maximum | Series of Individually Immaterial Business Acquisitions [Member] |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period | 7 years |  |  |
[1] | There is no accumulated impairment of goodwill for periods presented.

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- Definition The amount of goodwill arising from a business combination that is expected to be deductible for tax purposes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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