v2.4.0.8

Property and Equipment - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Jun. 29, 2013 | Jun. 30, 2012
Property, Plant and Equipment [Line Items] |  |
Sale of property | $ 4.3 | $ 5.1
Office buildings [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Number of office buildings acquired | 3 |
Aggregate square feet of buildings acquired | 151,000 |
Land [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Area of land acquired | 7.84 |
Value of land acquired | 11.8 |
Building and Building Improvements [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Additional area due to renovations and improvements | 10,000 |
Additional building related to renovations and improvements | 1 |
Santa Clara Headquarters Property [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Sale of property | 12.6 |
Net gain on sale of property | $ 1.6 |

X
- Definition Aggregate square footage of industrial buildings acquired. + References No definition available. + Details
Name: | syna_AggregateSquareFootageOfIndustrialBuildingsAcquired
Namespace Prefix: | syna_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Area of office buildings acquired. + References No definition available. + Details
Name: | syna_AreaOfOfficeBuildingsAcquired
Namespace Prefix: | syna_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Developable land that can accommodate additional building space. + References No definition available. + Details
Name: | syna_DevelopableLandThatCanAccommodateAdditionalBuildingSpace
Namespace Prefix: | syna_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of building related to repairs. + References No definition available. + Details
Name: | syna_NumberOfBuildingRelatedToRepairs
Namespace Prefix: | syna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of buildings acquired. + References No definition available. + Details
Name: | syna_NumberOfBuildingsAcquired
Namespace Prefix: | syna_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
Name: | us-gaap_GainLossOnDispositionOfAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAdditions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of divestiture of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentDisposals
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration