Stock-Based Compensation (Details 2) - MSUs - Monte Carlo simulation	6 Months Ended
Jan. 02, 2016	Dec. 27, 2014
Valuation Assumptions
Volatility of common stock (as a percent)	33.00%	40.80%
Average volatility of peer companies (as a percent)	52.60%	53.40%
Average correlation coefficient of peer companies	0.0887	0.2156
Risk-free interest rate (as a percent)	0.80%	0.60%

No definition available.

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(ii)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iv)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The assumption of average volatility of peer companies that is used in valuing an option or stock unit on its own shares.

+ References

No definition available.

+ Details

Name:	viav_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAverageVolatilityOfPeerCompanies
Namespace Prefix:	viav_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The assumption of average correlation coefficient of peer companies that is used in valuing an option or stock unit on its own shares.

+ References

No definition available.

+ Details

Name:	viav_ShareBasedCompensationArrangementbyShareBasedPaymentAwardFairValueAssumptionsAverageCorrelationCoefficientofPeerCompanies
Namespace Prefix:	viav_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_AwardTypeAxis=viav_FullValueAwardsWithMarketConditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ValuationTechniqueAxis=viav_MonteCarloSimulationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: