Employee Benefit Plans (Details) (Employee 401(k) Plans, USD $)	12 Months Ended
Jun. 30, 2012	Jul. 02, 2011	Jul. 03, 2010
Employee 401(k) Plans
Defined Contribution Plan
Maximum contribution by an employee, as percentage of annual compensation	50.00%
Maximum amount of contribution by an employee in a calendar year	$ 17,000
Percentage of eligible compensation, matched 100%	3.00%
Percentage of matching contribution made by the company, of first 3% of eligible compensation	100.00%
Percentage of eligible compensation, matched 50%	2.00%
Percentage of matching contribution made by the company, of next 2% of eligible compensation	50.00%
Eligible period of service, for restoring employer matching contributions	180 days
Matching contributions made by the company during the year	$ 7,200,000	$ 7,700,000	$ 4,300,000

- Details

Name:	jdsu_DefinedContributionPensionLineItems
Namespace Prefix:	jdsu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Company restored employer matching contributions in April 2010 to all eligible participants who have completed specified period of service (in day) with the company.

+ References

No definition available.

+ Details

Name:	jdsu_DefinedContributionPlanEligiblePeriodOfServiceForMatchingContribution
Namespace Prefix:	jdsu_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the matching contributions by the company to defined contribution plan.

+ References

No definition available.

+ Details

Name:	jdsu_DefinedContributionPlanMatchingContributions
Namespace Prefix:	jdsu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The maximum amount of annual contribution that can be made by employees as set by the Internal Revenue Service.

+ References

No definition available.

+ Details

Name:	jdsu_DefinedContributionPlanMaximumContributionByEmployeeAmountInCalendarYear
Namespace Prefix:	jdsu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The maximum percentage of annual compensation that can be contributed by employees.

+ References

No definition available.

+ Details

Name:	jdsu_DefinedContributionPlanMaximumContributionByEmployeeAsPercentageOfCompensation
Namespace Prefix:	jdsu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of employer contribution of the first 3 percent of the annual compensation contributed by the employees.

+ References

No definition available.

+ Details

Name:	jdsu_PercentageOfEmployerContributionOfFirst3PercentOfAnnualCompensationContributedByEmployee
Namespace Prefix:	jdsu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of employer contribution of the next 2 percent of the annual compensation contributed by the employees.

+ References

No definition available.

+ Details

Name:	jdsu_PercentageOfEmployerContributionOfNext2PercentOfAnnualCompensationContributedByEmployee
Namespace Prefix:	jdsu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation by employee contribution, 100% matched by employer.

+ References

No definition available.

+ Details

Name:	jdsu_PercentageOfFirstEligibleContributionMatched
Namespace Prefix:	jdsu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of eligible compensation by employee contribution, 50% matched by employer.

+ References

No definition available.

+ Details

Name:	jdsu_PercentageOfNextEligibleContributionMatched
Namespace Prefix:	jdsu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration