Rescission Offer (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Sep. 29, 2012
Rescission Offer
Shares issued under the ESPP in the past twelve months that may be subject to rescissionary rights	553,000
Shares subject to rescissionary rights purchased at $12.06 per share	235,000
Original price one of shares subject to rescissionary rights.	$ 12.06
Original price two of shares subject to rescissionary rights.	$ 9.35
Maximum potential aggregate payments including statutory interest, if holders rescinded their purchases (in dollars)	$ 6.2

- Definition

Represents the number of shares issued under the employee stock purchase plan that may be subject to rescissionary rights.

+ References

No definition available.

+ Details

Name:	jdsu_EmployeeStockPurchasePlansSharesThatMayBeSubjectToRescissionaryRightsNumber
Namespace Prefix:	jdsu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of shares issued under the employee stock purchase plan that may be subject to rescissionary rights which were purchased at original price one.

+ References

No definition available.

+ Details

Name:	jdsu_EmployeeStockPurchasePlansSharesThatMayBeSubjectToRescissionaryRightsNumberPurchasedAtOriginalPriceOne
Namespace Prefix:	jdsu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents original price one that shares issued under the employee stock purchase plan that may be subject to rescissionary rights were purchased.

+ References

No definition available.

+ Details

Name:	jdsu_EmployeeStockPurchasePlansSharesThatMayBeSubjectToRescissionaryRightsOriginalPriceOne
Namespace Prefix:	jdsu_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents original price two that shares issued under the employee stock purchase plan that may be subject to rescissionary rights were purchased.

+ References

No definition available.

+ Details

Name:	jdsu_EmployeeStockPurchasePlansSharesThatMayBeSubjectToRescissionaryRightsOriginalPriceTwo
Namespace Prefix:	jdsu_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

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

- Definition

Represents the maximum aggregate payments including statutory interest required to be paid, if the holders rescinded their purchases.

+ References

No definition available.

+ Details

Name:	jdsu_RescissionOfferMaximumPotentialPaymentsIncludingStatutoryInterest
Namespace Prefix:	jdsu_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant