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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. 30, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning Balance	$ 1,045.3	$ 1,116.5
Currency translation	17.4	(38.1)
Acquisition adjustments	34.7	(33.1)
Ending Balance	1,097.4	1,045.3
Commercial & Industrial Group
Goodwill [Roll Forward]
Beginning Balance	302.9	325.8
Currency translation	10.7	(22.4)
Acquisition adjustments	33.0	(0.5)
Ending Balance	346.6	302.9
Snap-on Tools Group
Goodwill [Roll Forward]
Beginning Balance	12.4	12.4
Currency translation	0.0	0.0
Acquisition adjustments	0.0	0.0
Ending Balance	12.4	12.4
Repair Systems  & Information Group
Goodwill [Roll Forward]
Beginning Balance	730.0	778.3
Currency translation	6.7	(15.7)
Acquisition adjustments	1.7	(32.6)
Ending Balance	$ 738.4	$ 730.0

X

- 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.

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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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