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Segments - Capital Expenditures, Depreciation and Amortization (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2023	Dec. 31, 2022	Jan. 01, 2022
Segment Reporting Information [Line Items]
Capital expenditures	$ 95.0	$ 84.2	$ 70.1
Depreciation and amortization	99.3	100.2	104.8
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditures	90.7	80.4	67.6
Depreciation and amortization	95.3	96.4	101.2
Operating Segments | Commercial & Industrial Group
Segment Reporting Information [Line Items]
Capital expenditures	22.5	26.0	24.3
Depreciation and amortization	25.7	26.1	28.2
Operating Segments | Snap-on Tools Group
Segment Reporting Information [Line Items]
Capital expenditures	46.1	35.0	27.1
Depreciation and amortization	29.3	29.3	31.2
Operating Segments | Repair Systems  & Information Group
Segment Reporting Information [Line Items]
Capital expenditures	20.3	18.3	15.4
Depreciation and amortization	39.4	40.1	40.9
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Capital expenditures	1.8	1.1	0.8
Depreciation and amortization	0.9	0.9	0.9
Corporate
Segment Reporting Information [Line Items]
Capital expenditures	4.3	3.8	2.5
Depreciation and amortization	$ 4.0	$ 3.8	$ 3.6

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

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- Definition

The cash outflow for acquisition of or capital improvements to properties held for investment (operating, managed, leased) or for use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 230
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-Name Accounting Standards Codification
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+ References

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