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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, 2024	Dec. 30, 2023
Goodwill [Roll Forward]
Beginning balance	$ 1,097.4	$ 1,045.3
Currency translation	(27.4)	17.4
Acquisition adjustments	(13.2)	34.7
Ending balance	1,056.8	1,097.4
Commercial & Industrial Group
Goodwill [Roll Forward]
Beginning balance	346.6	302.9
Currency translation	(17.8)	10.7
Acquisition adjustments	(13.2)	33.0
Ending balance	315.6	346.6
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	738.4	730.0
Currency translation	(9.6)	6.7
Acquisition adjustments	0.0	1.7
Ending balance	$ 728.8	$ 738.4

X

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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Amount of foreign currency translation gain (loss) which increases (decreases) asset representing future economic benefit from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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