Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Segment (Details) $ in Millions	9 Months Ended
Oct. 03, 2026 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 1,109.5
Currency translation	(18.3)
Acquisitions	135.1
Ending balance	1,226.3
Commercial & Industrial Group
Goodwill [Roll Forward]
Beginning balance	349.4
Currency translation	(11.3)
Acquisitions	39.0
Ending balance	377.1
Snap-on Tools Group
Goodwill [Roll Forward]
Beginning balance	12.4
Currency translation	0.0
Acquisitions	0.0
Ending balance	12.4
Repair Systems & Information Group
Goodwill [Roll Forward]
Beginning balance	747.7
Currency translation	(7.0)
Acquisitions	96.1
Ending balance	$ 836.8

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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+ Details