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Income Taxes - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Sep. 30, 2021
Income Tax Disclosure [Line Items] |  |  |  |  |
Federal statutory income tax rate | 21.00% | 21.00% | 21.00% | 21.00% |
Tax expense related to gain on sale of PLM services business | $ 15,500 |  |  |  |
Tax deductible goodwill |  |  | $ 8,100 |  |
Unrecognized tax benefits | 24,100,000 |  | 24,100,000 |  | $ 21,200,000
Income tax provision upon recognition of unrecognized tax benefit | 24,100,000 |  | 24,100,000 |  |
Unrecognized tax benefits that would impact valuation allowance | 4,900,000 |  | 4,900,000 |  |
Potential decrease in unrecognized tax benefits | $ (3,000,000) |  | (3,000,000) |  |
Arena Solutions |  |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |  |
Reduction of valuation allowance |  |  | (42,300,000) |  |
Charge related to effects of Non US Jurisdiction unrecognized tax benefit |  |  | $ 37,300,000 |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319 + Details
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