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Segments - Assets by Segment (Detail) - USD ($) $ in Millions	Sep. 29, 2018	Dec. 30, 2017
Segment Reporting Information [Line Items]
Assets	$ 5,354.8	$ 5,249.1
Operating Segments
Segment Reporting Information [Line Items]
Assets	5,191.7	5,114.3
Operating Segments | Commercial & Industrial Group
Segment Reporting Information [Line Items]
Assets	1,096.8	1,113.9
Operating Segments | Snap-on Tools Group
Segment Reporting Information [Line Items]
Assets	773.2	714.3
Operating Segments | Repair Systems & Information Group
Segment Reporting Information [Line Items]
Assets	1,297.7	1,314.3
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Assets	2,024.0	1,971.8
Corporate
Segment Reporting Information [Line Items]
Assets	229.7	200.6
Elimination of intersegment receivables
Segment Reporting Information [Line Items]
Assets	$ (66.6)	$ (65.8)

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- 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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+ References

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