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Business Combinations - Narrative (Details) - USD ($) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Oct. 01, 2021 | Jan. 22, 2021 | Sep. 30, 2021
Threat Stack, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Total purchase price | $ 68.9 |  |
Identifiable intangible assets useful life | 5 years |  |
Volterra, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Total purchase price |  | $ 427.2 |
Identifiable intangible assets useful life |  | 6 years 11 months 12 days |
Volterra, Inc. | General and Administrative Expense |  |  |
Business Acquisition [Line Items] |  |  |
Business combination, acquisition related costs |  |  | $ 9.5
Developed Technology Rights | Threat Stack, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets useful life | 5 years |  |
Developed Technology Rights | Volterra, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets useful life |  | 7 years |
Customer Relationships | Threat Stack, Inc |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets useful life | 5 years |  |
Customer Relationships | Volterra, Inc. |  |  |
Business Acquisition [Line Items] |  |  |
Identifiable intangible assets useful life |  | 1 year |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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=123586518&loc=d3e1043-128460 + Details
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: 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=123570139&loc=d3e3213-108585 + Details
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