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Segments - Capital Expenditures, Depreciation and Amortization (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jan. 02, 2016 | Jan. 03, 2015 | Dec. 28, 2013
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 80.4 | $ 80.6 | $ 70.6
Depreciation and amortization | 82.5 | 79.5 | 76.7
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 79.1 | 76.4 | 65.4
Depreciation and amortization | 79.7 | 76.8 | 74.4
Operating Segments [Member] | Commercial & Industrial Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 31.0 | 28.5 | 25.3
Depreciation and amortization | 20.1 | 20.8 | 20.3
Operating Segments [Member] | Snap-on Tools Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 38.1 | 36.9 | 26.6
Depreciation and amortization | 24.9 | 21.4 | 19.5
Operating Segments [Member] | Repair Systems & Information Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 9.0 | 10.6 | 13.0
Depreciation and amortization | 34.0 | 33.7 | 33.8
Operating Segments [Member] | Financial Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1.0 | 0.4 | 0.5
Depreciation and amortization | 0.7 | 0.9 | 0.8
Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1.3 | 4.2 | 5.2
Depreciation and amortization | $ 2.8 | $ 2.7 | $ 2.3

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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