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Acquisitions - Additional Information (Detail) (Pro-Cut International, Inc [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	May 28, 2014
Pro-Cut International, Inc [Member]
Business Acquisition [Line Items]
Cash purchase price of acquisition	$ 41.3us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = sna_ProCutInternationalIncMember

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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

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