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Debt - Additional Information (Details) |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 27, 2017 | Aug. 21, 2013 USD ($) $ / shares | Mar. 31, 2017 USD ($) | Jun. 27, 2015 noteholder | Jul. 01, 2017 USD ($) d day $ / shares | Jul. 02, 2016 USD ($) | Jun. 27, 2015 USD ($) | Mar. 22, 2017 USD ($) | Mar. 03, 2017 USD ($) | Aug. 15, 2013
Debt |  |  |  |  |  |  |  |  |  |
Short-term debt outstanding |  |  |  |  | $ 0 | $ 0 |  |  |  |
Cash paid in debt repurchase |  |  |  |  | 45,400,000 | 0 | $ 0 |  |  |
Loss on extinguishment of debt |  |  |  |  | 1,100,000 | 0 | $ 0 |  |  |
Convertible Debt |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Carrying value of the equity component of convertible debt |  |  |  |  | 229,700,000 | 134,400,000 |  |  |  |
Unamortized debt issuance cost |  |  |  |  | $ 9,200,000 | 5,000,000 |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Interest rate on senior convertible notes |  |  |  |  | 1.00% |  |  |  | 1.00% |
Aggregate principal amount of convertible debt |  |  |  |  |  |  |  | $ 60,000,000 | $ 400,000,000 |
Total proceeds net of issuance costs |  |  | $ 451,100,000 |  |  |  |  |  |  |
Effective interest rate |  |  |  |  | 4.80% |  |  |  |  |
Initial conversion price (in dollars per share) | $ / shares |  |  |  |  | $ 13.22 |  |  |  |  |
Premium of initial conversion price over closing stock price | 32.50% |  |  |  |  |  |  |  |  |
Percentage of principal amount at which the entity may redeem some or all of the notes for cash |  |  |  |  | 100.00% |  |  |  |  |
Derivative term |  |  |  |  | 7 years |  |  |  |  |
Carrying value of the liability component |  |  |  |  | $ 358,100,000 |  |  |  |  |
Carrying value of the equity component of convertible debt |  |  |  |  | $ 101,900,000 |  |  |  |  |
Remaining term of convertible notes |  |  |  |  | 6 years 8 months 12 days |  |  |  |  |
Debt issuance costs incurred |  |  |  |  |  |  |  | 8,900,000 |  |
Fair market value of convertible debt |  |  |  |  | $ 481,700,000 |  |  |  |  |
Amount outstanding |  |  |  |  | $ 460,000,000 | 0 |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria one |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Percentage of the conversion price that the closing price of the entity's common stock must exceed in order for the notes to be convertible |  |  |  |  | 130.00% |  |  |  |  |
Number of trading days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable | day |  |  |  |  | 20 |  |  |  |  |
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 trading days in order for the notes to be redeemable |  |  |  |  | 30 days |  |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria two |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Number of trading days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable | d |  |  |  |  | 45 |  |  |  |  |
Trading days used to calculate stock price trigger | d |  |  |  |  | 10 |  |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria three |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Threshold premium of stock price trigger |  |  |  |  | 10.00% |  |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes | Conversion criteria five |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Percentage of the conversion price that the closing price of the entity's common stock must exceed in order for the notes to be convertible |  |  |  |  | 98.00% |  |  |  |  |
Number of consecutive business days immediately following any 10 consecutive trading day period |  |  |  |  | 5 days |  |  |  |  |
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 trading days in order for the notes to be redeemable |  |  |  |  | 10 days |  |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes, Liability Component |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Debt issuance costs incurred |  |  |  |  |  |  |  | 6,900,000 |  |
Unamortized debt issuance cost |  |  |  |  | $ 6,600,000 |  |  |  |  |
Convertible Debt | 1.00% Senior Convertible Notes, Equity Component |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Debt issuance costs incurred |  |  |  |  |  |  |  | $ 2,000,000 |  |
Convertible Debt | 0.625% Senior Convertible Notes |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Interest rate on senior convertible notes |  |  |  |  | 0.625% |  |  |  |  |
Aggregate principal amount of convertible debt |  | $ 650,000,000.0 |  |  |  |  |  |  |  |
Total proceeds net of issuance costs |  | $ 636,300,000 |  |  |  |  |  |  |  |
Effective interest rate |  | 5.40% |  |  |  |  |  |  |  |
Conversion price of debt (in dollars per share) | $ / shares |  | $ 18.83 |  |  | $ 11.28 |  |  |  |  |
Conversion price of convertible debt as premium on closing price of common stock (as a percent) |  |  |  |  |  |  |  |  |  | 40.00%
Principal amount used for debt instrument conversion |  | $ 1,000 |  |  | $ 1,000 |  |  |  |  |
Number of consecutive business days immediately following any 10 consecutive trading day period |  |  |  |  | 5 days |  |  |  |  |
Number of consecutive trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 trading days in order for the notes to be redeemable |  |  |  |  | 30 days |  |  |  |  |
Number of consecutive trading days before five consecutive business-days |  |  |  |  | 10 days |  |  |  |  |
Percentage of principal amount at which the entity may redeem some or all of the notes for cash |  | 100.00% |  |  |  |  |  |  |  |
Number of note holders exercising conversion rights before expiration notice | noteholder |  |  |  | 0 |  |  |  |  |  |
Percentage of principal amount that the holder of the note may require the entity to repurchase the debt instrument |  | 100.00% |  |  |  |  |  |  |  |
Discount rate used to calculate the carrying value of the liability component of the convertible debt (as a percent) |  | 5.40% |  |  |  |  |  |  |  |
Variable rate basis on which disclount rate is based |  | 5 years |  |  |  |  |  |  |  |
Carrying value of the liability component |  | $ 515,600,000 |  |  |  |  |  |  |  |
Carrying value of the equity component of convertible debt |  | 134,400,000 |  |  |  |  |  |  |  |
Remaining term of convertible notes |  |  |  |  | 1 year 1 month 6 days |  |  |  |  |
Deferred finance costs |  | 13,700,000 |  |  |  |  |  |  |  |
Liability component, debt issuance cost |  | 10,900,000 |  |  |  |  |  |  |  |
Equity component, debt issuance cost |  | $ 2,800,000 |  |  |  |  |  |  |  |
Aggregate amount of debt repurchased |  |  |  |  | $ 40,000,000 |  |  |  |  |
Cash paid in debt repurchase |  |  |  |  | 45,400,000 |  |  |  |  |
Loss on extinguishment of debt |  |  |  |  | 1,100,000 |  |  |  |  |
Fair market value of convertible debt |  |  |  |  | 676,100,000 | 633,000,000 |  |  |  |
Amount outstanding |  |  |  |  | 610,000,000 | $ 650,000,000 |  |  |  |
Convertible Debt | 0.625% Senior Convertible Notes | Other non-current assets |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Unamortized portion of debt issuance cost |  |  |  |  | $ 2,600,000 |  |  |  |  |
Convertible Debt | 0.625% Senior Convertible Notes | Minimum |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Percentage of the conversion price that the closing price of the entity's common stock must exceed in order for the notes to be convertible |  |  |  |  | 130.00% |  |  |  |  |
Number of trading days within 30 consecutive trading days in which the closing price of the entity's common stock must exceed the conversion price for the notes to be redeemable | d |  |  |  |  | 20 |  |  |  |  |
Convertible Debt | 0.625% Senior Convertible Notes | Maximum |  |  |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |  |  |
Percentage of the trading price to the closing sale price of the entity's common stock |  |  |  |  | 98.00% |  |  |  |  |

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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Convertible Security -URI http://asc.fasb.org/extlink&oid=6509036 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instruments must exceed threshold percentage for a specified number of trading days to trigger conversion feature, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 + Details
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- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585 + Details
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- Definition The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, carrying amount of the debt liability component identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company. + References No definition available. + Details
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- Definition Represents the number of consecutive business days immediately following any 10 consecutive trading day period. + References No definition available. + Details
Name: | viav_DebtInstrumentConvertibleNumberOfConsecutiveBusinessDaysFollowingConsecutiveTradingDayPeriod
Namespace Prefix: | viav_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of consecutive trading days prior to the five consecutive business-days. + References No definition available. + Details
Name: | viav_DebtInstrumentConvertiblePeriodOfConsecutiveTradingDays
Namespace Prefix: | viav_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Convertible, Threshold Premium Of Stock Price Trigger + References No definition available. + Details
Name: | viav_DebtInstrumentConvertibleThresholdPremiumOfStockPriceTrigger
Namespace Prefix: | viav_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Debt Instrument, Convertible, Trading Days Used To Calculate Stock Price Trigger + References No definition available. + Details
Name: | viav_DebtInstrumentConvertibleTradingDaysUsedToCalculateStockPriceTrigger
Namespace Prefix: | viav_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of the product of the closing sale price of the entity's common stock and the applicable conversion rate that the trading price of each debt instrument must be less than in order for the debt instruments to be convertible. + References No definition available. + Details
Name: | viav_DebtInstrumentConvertibleTradingPriceAsPercentageOfClosingPriceOfCommonStock
Namespace Prefix: | viav_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the principal amount of notes used as denominator for purposes of computing the conversion ratio of convertible debt. + References No definition available. + Details
Name: | viav_DebtInstrumentPrincipalAmountDenominationForConversionOfDebt
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the percentage of principal amount at which the holder of the note may require the entity to repurchase the debt instrument. + References No definition available. + Details
Name: | viav_DebtInstrumentRepurchaseRequirementPercentageOfPrincipalAmount
Namespace Prefix: | viav_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the amount of finance costs associated with the convertible debt issuance which is allocated to the liability component of the instrument. + References No definition available. + Details
Name: | viav_DebtIssuanceExpenseAllocatedToDebtPortion
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of finance costs associated with the convertible debt issuance which is allocated to the equity component of the instrument. + References No definition available. + Details
Name: | viav_DebtIssuanceExpenseAllocatedToEquityPortion
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair Value Inputs, Discount Period + References No definition available. + Details
Name: | viav_FairValueInputsDiscountPeriod
Namespace Prefix: | viav_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain. Such amount is before the consideration of accumulated amortization. + References No definition available. + Details
Name: | viav_GrossDeferredFinanceCosts
Namespace Prefix: | viav_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Note Holders Exercising Conversion Rights Before Expiration Notice + References No definition available. + Details
Name: | viav_NumberOfNoteHoldersExercisingConversionRightsBeforeExpirationNotice
Namespace Prefix: | viav_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LongtermDebtTypeAxis=us-gaap_ConvertibleDebtMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=viav_SeniorOnePercentConvertibleNotesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=viav_DebtRedemptionConvertibleDebtConversionCriteriaOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=viav_DebtRedemptionConvertibleDebtConversionCriteriaTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=viav_DebtRedemptionConvertibleDebtConversionCriteriaThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentRedemptionPeriodAxis=viav_DebtRedemptionConvertibleDebtConversionCriteriaFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=viav_SeniorOnePercentConvertibleNotesLiabilityComponentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=viav_SeniorOnePercentConvertibleNotesEquityComponentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=viav_Senior0.625PercentConvertibleDebenturesDue2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |