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Segments - Capital Expenditures, Depreciation and Amortization (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 30, 2017 | Dec. 31, 2016 | Jan. 02, 2016
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 82.0 | $ 74.3 | $ 80.4
Depreciation and amortization | 93.2 | 85.6 | 82.5
Operating Segments [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 77.3 | 71.3 | 79.1
Depreciation and amortization | 90.3 | 82.8 | 79.7
Operating Segments [Member] | Commercial & Industrial Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 22.6 | 19.3 | 31.0
Depreciation and amortization | 22.8 | 20.7 | 20.1
Operating Segments [Member] | Snap-on Tools Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 40.1 | 38.3 | 38.1
Depreciation and amortization | 29.1 | 27.6 | 24.9
Operating Segments [Member] | Repair Systems & Information Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 13.4 | 13.1 | 9.0
Depreciation and amortization | 37.8 | 33.9 | 34.0
Operating Segments [Member] | Financial Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 1.2 | 0.6 | 1.0
Depreciation and amortization | 0.6 | 0.6 | 0.7
Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 4.7 | 3.0 | 1.3
Depreciation and amortization | $ 2.9 | $ 2.8 | $ 2.8

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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=98514028&loc=d3e3602-108585 + Details
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- Definition The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585 + Details
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