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v2.4.0.6

Segments (Net Sales By Segment) (Parenthetical) (Detail) | 12 Months Ended
--- | ---
Dec. 29, 2012
Segment Reporting Information [Line Items] |
Percentage of revenues | 10.00%

X
- Definition Percentage Of Revenue Accounted By Major Customer + References No definition available. + Details
Name: | sna_PercentageOfRevenueAccountedByMajorCustomer
Namespace Prefix: | sna_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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