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Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill by Segment (Details) $ in Millions	6 Months Ended
	Jun. 28, 2025 USD ($)
Goodwill [Roll Forward]
Beginning balances	$ 1,056.8
Currency translation	45.8
Ending balances	1,102.6
Commercial & Industrial Group
Goodwill [Roll Forward]
Beginning balances	315.6
Currency translation	29.1
Ending balances	344.7
Snap-on Tools Group
Goodwill [Roll Forward]
Beginning balances	12.4
Currency translation	0.0
Ending balances	12.4
Repair Systems & Information Group
Goodwill [Roll Forward]
Beginning balances	728.8
Currency translation	16.7
Ending balances	$ 745.5

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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X

- Definition

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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- Definition

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