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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 29, 2018 | Dec. 30, 2017
Goodwill [Roll Forward] |  |
Beginning Balance | $ 924.1 | $ 895.5
Currency translation | (26.0) | 46.1
Acquisitions | 4.1 | (17.5)
Ending Balance | 902.2 | 924.1
Commercial & Industrial Group |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 298.4 | 242.4
Currency translation | (16.3) | 30.3
Acquisitions | 4.1 | 25.7
Ending Balance | 286.2 | 298.4
Snap-on Tools Group |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 12.5 | 12.5
Currency translation | 0.0 | 0.0
Acquisitions | 0.0 | 0.0
Ending Balance | 12.5 | 12.5
Repair Systems & Information Group |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 613.2 | 640.6
Currency translation | (9.7) | 15.8
Acquisitions | 0.0 | (43.2)
Ending Balance | $ 603.5 | $ 613.2

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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