Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2024	Jul. 01, 2023	Jun. 29, 2024	Jul. 01, 2023
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,172.0	$ 1,184.6	$ 2,347.2	$ 2,361.1
Net sales	1,279.9	1,284.7	2,561.8	2,560.3
Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(129.4)	(148.0)	(270.9)	(312.4)
Commercial & Industrial Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	372.0	364.2	731.9	728.0
Snap-on Tools Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	482.0	523.1	982.1	1,060.1
Repair Systems & Information Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	454.8	452.0	918.6	898.6
Financial Services \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	100.5	93.4	200.1	186.0
Other revenues
Disaggregation of Revenue [Line Items]
Net sales	7.4	6.7	14.5	13.2
Total net sales
Disaggregation of Revenue [Line Items]
Net sales	1,179.4	1,191.3	2,361.7	2,374.3
Total net sales \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	1,179.4	1,191.3	2,361.7	2,374.3
Total net sales \| Vehicle service professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	895.4	923.2	1,807.0	1,848.7
Total net sales \| All other professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	284.0	268.1	554.7	525.6
Total net sales \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	1,308.8	1,339.3	2,632.6	2,686.7
Total net sales \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	(129.4)	(148.0)	(270.9)	(312.4)
Total net sales \| Commercial & Industrial Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	372.0	364.2	731.9	728.0
Total net sales \| Commercial & Industrial Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	305.0	289.8	596.0	568.4
Total net sales \| Commercial & Industrial Group \| Total assets from reportable segments \| Vehicle service professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	21.0	21.7	41.3	42.8
Total net sales \| Commercial & Industrial Group \| Total assets from reportable segments \| All other professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	284.0	268.1	554.7	525.6
Total net sales \| Commercial & Industrial Group \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	67.0	74.4	135.9	159.6
Total net sales \| Snap-on Tools Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	482.0	523.1	982.1	1,060.1
Total net sales \| Snap-on Tools Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	482.0	523.1	982.1	1,060.1
Total net sales \| Snap-on Tools Group \| Total assets from reportable segments \| Vehicle service professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	482.0	523.1	982.1	1,060.1
Total net sales \| Snap-on Tools Group \| Total assets from reportable segments \| All other professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Snap-on Tools Group \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Repair Systems & Information Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	454.8	452.0	918.6	898.6
Total net sales \| Repair Systems & Information Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	392.4	378.4	783.6	745.8
Total net sales \| Repair Systems & Information Group \| Total assets from reportable segments \| Vehicle service professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	392.4	378.4	783.6	745.8
Total net sales \| Repair Systems & Information Group \| Total assets from reportable segments \| All other professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Repair Systems & Information Group \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	62.4	73.6	135.0	152.8
Total net sales \| Financial Services \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Financial Services \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Financial Services \| Total assets from reportable segments \| Vehicle service professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Financial Services \| Total assets from reportable segments \| All other professionals \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Financial Services \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| North America \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	875.1	889.5	1,759.1	1,782.8
Total net sales \| North America \| Commercial & Industrial Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	163.5	144.3	312.1	281.9
Total net sales \| North America \| Snap-on Tools Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	413.4	459.3	846.7	933.2
Total net sales \| North America \| Repair Systems & Information Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	298.2	285.9	600.3	567.7
Total net sales \| North America \| Financial Services \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| Europe \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	185.4	178.1	368.1	352.0
Total net sales \| Europe \| Commercial & Industrial Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	76.8	75.5	157.8	150.5
Total net sales \| Europe \| Snap-on Tools Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	41.4	39.0	81.0	74.7
Total net sales \| Europe \| Repair Systems & Information Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	67.2	63.6	129.3	126.8
Total net sales \| Europe \| Financial Services \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Total net sales \| All other \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	118.9	123.7	234.5	239.5
Total net sales \| All other \| Commercial & Industrial Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	64.7	70.0	126.1	136.0
Total net sales \| All other \| Snap-on Tools Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	27.2	24.8	54.4	52.2
Total net sales \| All other \| Repair Systems & Information Group \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	27.0	28.9	54.0	51.3
Total net sales \| All other \| Financial Services \| Total assets from reportable segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue
Disaggregation of Revenue [Line Items]
Net sales	100.5	93.4	200.1	186.0
Financial services revenue \| Intersegment eliminations
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Commercial & Industrial Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Snap-on Tools Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Repair Systems & Information Group \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Financial Services
Disaggregation of Revenue [Line Items]
Net sales	100.5	93.4	200.1	186.0
Financial services revenue \| Financial Services \| Total assets from reportable segments
Disaggregation of Revenue [Line Items]
Net sales	$ 100.5	$ 93.4	$ 200.1	$ 186.0