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Segments - Capital Expenditures, Depreciation and Amortization (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 29, 2018 | Dec. 30, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | $ 90.9 | $ 82.0 | $ 74.3
Depreciation and amortization | 94.1 | 93.2 | 85.6
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 87.7 | 77.3 | 71.3
Depreciation and amortization | 91.0 | 90.3 | 82.8
Operating Segments | Commercial & Industrial Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 21.5 | 22.6 | 19.3
Depreciation and amortization | 23.6 | 22.8 | 20.7
Operating Segments | Snap-on Tools Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 46.0 | 40.1 | 38.3
Depreciation and amortization | 29.9 | 29.1 | 27.6
Operating Segments | Repair Systems & Information Group |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 19.7 | 13.4 | 13.1
Depreciation and amortization | 36.7 | 37.8 | 33.9
Operating Segments | Financial Services |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 0.5 | 1.2 | 0.6
Depreciation and amortization | 0.8 | 0.6 | 0.6
Corporate |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital expenditures | 3.2 | 4.7 | 3.0
Depreciation and amortization | $ 3.1 | $ 2.9 | $ 2.8

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