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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. 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

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
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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