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Business Combinations - 2018 Acquisitions (Details) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 11, 2017 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016
Business Acquisition [Line Items] |  |  |  |
Payments to acquire business net of cash and short-term investments |  | $ 637,000 |  |
Goodwill |  | 3,143,249 | $ 2,706,974 | $ 2,518,245
Black Duck Software |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Payments to acquire business net of cash and short-term investments |  | 544,000 |  |
Percent of company acquired | 100.00% |  |  |
Total purchase consideration | $ 565,100 | 565,088 |  |
Goodwill |  | 395,395 |  |
Identifiable intangibles assets acquired |  | 178,000 |  |
Acquisition-related costs |  | 15,500 |  |
Equity awards and options acquired, amount |  | 15,600 |  |
Fair value of assumed equity awards allocated to purchase consideration |  | 1,588 |  |
Fair value of stock reserved for future use |  | 14,000 |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 47,600 |  |
Identifiable intangibles assets acquired |  | 51,900 |  |
Acquisition-related costs |  | 3,800 |  |
Payments to acquire businesses, net of cash acquired |  | $ 93,000 |  |
Minimum | Black Duck Software |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period |  | 1 year |  |
Minimum | Series of Individually Immaterial Business Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period |  | 1 year |  |
Maximum | Black Duck Software |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period |  | 10 years |  |
Maximum | Series of Individually Immaterial Business Acquisitions |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Definite lived intangible asset amortization period |  | 7 years |  |

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- Definition Business Acquisition, Equity Awards and Options Acquired, Amount + References No definition available. + Details
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- Definition Fair Value Of Unvested Stock Options Assumed which will be expensed over their remaining service periods. + References No definition available. + Details
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- Definition Payments to Acquire Businesses, Net of Cash, Cash Equivalents And Short-term Investments + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition The amount of identifiable intangible assets recognized as of the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=108330185&loc=d3e2207-128464 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3213-108585 + Details
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