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Segments - Assets by Segment (Detail) - USD ($) $ in Millions	Oct. 03, 2015	Jan. 03, 2015
Segment Reporting Information [Line Items]
Assets	$ 4,491.4	$ 4,310.1
Operating Segments [Member]
Segment Reporting Information [Line Items]
Assets	4,163.6	3,944.9
Operating Segments [Member] | Commercial & Industrial Group [Member]
Segment Reporting Information [Line Items]
Assets	936.1	939.7
Operating Segments [Member] | Snap-on Tools Group [Member]
Segment Reporting Information [Line Items]
Assets	656.2	600.1
Operating Segments [Member] | Repair Systems & Information Group [Member]
Segment Reporting Information [Line Items]
Assets	1,058.0	1,036.8
Operating Segments [Member] | Financial Services [Member]
Segment Reporting Information [Line Items]
Assets	1,513.3	1,368.3
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	371.6	401.7
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Assets	$ (43.8)	$ (36.5)

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-Subparagraph (SX 210.5-02.18)



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 210



-SubTopic 10



-Section S99



-Paragraph 1



-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 12



-Article 7

+ Details

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- Definition

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+ References

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