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Segments - Assets by Segment (Detail) - USD ($) $ in Millions	Apr. 03, 2021	Jan. 02, 2021
Segment Reporting Information [Line Items]
Assets	$ 6,673.5	$ 6,557.3
Operating Segments
Segment Reporting Information [Line Items]
Assets	5,684.7	5,555.7
Operating Segments | Commercial & Industrial Group
Segment Reporting Information [Line Items]
Assets	1,174.0	1,210.4
Operating Segments | Snap-on Tools Group
Segment Reporting Information [Line Items]
Assets	771.1	775.3
Operating Segments | Repair Systems & Information Group
Segment Reporting Information [Line Items]
Assets	1,590.6	1,399.7
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Assets	2,149.0	2,170.3
Corporate
Segment Reporting Information [Line Items]
Assets	1,054.2	1,063.2
Elimination of intersegment receivables
Segment Reporting Information [Line Items]
Assets	$ (65.4)	$ (61.6)

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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.

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