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v3.21.1

Revenue from Contracts with Customers - Additional Information (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2021 | Mar. 28, 2020 | Mar. 31, 2021 | Mar. 28, 2020 | Sep. 30, 2020
Revenue from External Customer [Line Items] |  |  |  |  |
Contract with customer, asset, expected to be transferred to receivables within the next 12 months and therefore | $ 7,600,000 |  | $ 7,600,000 |  |
Contract with customer, asset, reclassified to receivable |  |  | 6,300,000 |  |
Contract with customer, asset, increase in contract assets related to revenue recognized |  |  | 4,600,000 |  |
Impairments of the contract cost asset | 0 | $ 0 | 0 | $ 0 |
Deferred revenue, revenue recognized |  |  | 302,900,000 |  |
Deferred revenue, additions |  |  | 353,300,000 |  |
Short term and long term accounts receivable | 578,100,000 |  | 578,100,000 |  | $ 511,300,000
Refund liability | 39,600,000 |  | 39,600,000 |  | 34,500,000
Allowance for doubtful accounts receivable | 500,000 |  | 500,000 |  | 500,000
Amortization expense related to costs to obtain a contract with a customer | 11,000,000.0 | $ 8,500,000 | 21,400,000 | $ 16,200,000 |
Deferred revenue | 492,421,000 |  | 492,421,000 |  | 426,465,000
Revenue, remaining performance obligation, amount | 1,386,900,000 |  | 1,386,900,000 |  |
Unrecorded |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Revenue, remaining performance obligation, amount | 894,500,000 |  | 894,500,000 |  |
Other Current Assets |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Capitalized contract cost, net | 41,000,000.0 |  | 41,000,000.0 |  | 33,900,000
Other Assets |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Capitalized contract cost, net | $ 73,400,000 |  | 73,400,000 |  | $ 72,900,000
Arena Solutions |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |
Deferred revenue increased |  |  | $ 15,500,000 |  |

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121599878&loc=SL82895884-210446 + Details
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- Definition Amount of accumulated impairment loss for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
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