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Segments (Capital Expenditures, Depreciation And Amortization) (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 29, 2012 | Dec. 31, 2011 | Jan. 01, 2011
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures from reportable segments | $ 72.3 | $ 58.5 | $ 47.9
Corporate | 7.1 | 2.7 | 3.2
Total capital expenditures | 79.4 | 61.2 | 51.1
Total depreciation and amortization from reportable segments | 74.8 | 72.8 | 71.1
Corporate | 1.9 | 1.8 | 1.6
Total depreciation and amortization | 76.7 | 74.6 | 72.7
Commercial & Industrial Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures from reportable segments | 31.0 | 20.9 | 22.1
Total depreciation and amortization from reportable segments | 21.2 | 21.3 | 21.6
Snap-On Tools Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures from reportable segments | 29.9 | 29.1 | 19.0
Total depreciation and amortization from reportable segments | 17.9 | 17.2 | 16.2
Repair Systems & Information Group [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures from reportable segments | 9.8 | 8.1 | 6.6
Total depreciation and amortization from reportable segments | 35.1 | 33.9 | 32.6
Financial Services [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures from reportable segments | 1.6 | 0.4 | 0.2
Total depreciation and amortization from reportable segments | $ 0.6 | $ 0.4 | $ 0.7

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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=6943989&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 Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: 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=6943989&loc=d3e3213-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 17 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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