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Segments - Assets by Segment (Detail) - USD ($) $ in Millions | Jul. 04, 2015 | Jan. 03, 2015
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Assets | $ 4,390.7 | $ 4,310.1
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 4,059.1 | 3,944.9
Operating Segments [Member] | Commercial & Industrial Group [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 931.6 | 939.7
Operating Segments [Member] | Snap-on Tools Group [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 637.3 | 600.1
Operating Segments [Member] | Repair Systems & Information Group [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,037.6 | 1,036.8
Operating Segments [Member] | Financial Services [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 1,452.6 | 1,368.3
Corporate [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | 378.8 | 401.7
Intersegment Eliminations [Member] |  |
Segment Reporting Information [Line Items] |  |
Assets | $ (47.2) | $ (36.5)

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