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Segments - Assets by Segment (Detail) - USD ($) $ in Millions | Dec. 28, 2019 | Dec. 29, 2018
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Assets | $ 5,693.5 | $ 5,373.1
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Assets | 5,452.1 | 5,186.5
Operating Segments | Commercial & Industrial Group |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,138.8 | 1,087.9
Operating Segments | Snap-on Tools Group |  |
Segment Reporting Information [Line Items] |  |
Assets | 827.4 | 752.7
Operating Segments | Repair Systems & Information Group |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,381.9 | 1,306.3
Operating Segments | Financial Services |  |
Segment Reporting Information [Line Items] |  |
Assets | 2,104.0 | 2,039.6
Corporate |  |
Segment Reporting Information [Line Items] |  |
Assets | 303.1 | 249.2
Intersegment eliminations |  |
Segment Reporting Information [Line Items] |  |
Assets | $ (61.7) | $ (62.6)

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