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Balance Sheet and Other Details - Contract Liabilities (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 01, 2022 | Jan. 01, 2022
Deferred revenue: |  |
Balance at beginning of period | $ 85.1 | $ 89.5
Revenue deferrals for new contracts | 29.7 | 56.7
Revenue recognized during the period | (33.6) | (65.0)
Balance at end of period | $ 81.2 | $ 81.2

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130549-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123360276&loc=SL49130532-203044 + Details
Name: | us-gaap_ContractWithCustomerLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Change In Contract With Customer, Liability [Roll Forward] + References No definition available. + Details
Name: | viav_ChangeInContractWithCustomerLiabilityRollForward
Namespace Prefix: | viav_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Contract With Customer, Liability, Cumulative Catch-Up Adjustment, New Contracts + References No definition available. + Details
Name: | viav_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentNewContracts
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract With Customer, Liability, Revenue Recognized During Period + References No definition available. + Details
Name: | viav_ContractWithCustomerLiabilityRevenueRecognizedDuringPeriod
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration