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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Goodwill [Roll Forward]
Beginning Balance	$ 902.2	$ 924.1
Currency translation	(7.5)	(26.0)
Acquisitions	19.1	4.1
Ending Balance	913.8	902.2
Commercial & Industrial Group
Goodwill [Roll Forward]
Beginning Balance	286.2	298.4
Currency translation	(6.4)	(16.3)
Acquisitions	6.4	4.1
Ending Balance	286.2	286.2
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	603.5	613.2
Currency translation	(1.1)	(9.7)
Acquisitions	12.7	0.0
Ending Balance	$ 615.1	$ 603.5

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- Definition

Goodwill acquired and related adjustment.

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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

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-Publisher FASB
-Name Accounting Standards Codification
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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.

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-Topic 805
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