Revenue Recognition - Revenue Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2025	Jun. 29, 2024	Jun. 28, 2025	Jun. 29, 2024
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,170.9	$ 1,172.0	$ 2,304.2	$ 2,347.2
Net sales	1,281.1	1,279.9	2,524.3	2,561.8
Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(128.0)	(129.4)	(269.6)	(270.9)
Commercial & Industrial Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	347.8	372.0	691.7	731.9
Snap-on Tools Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	491.0	482.0	953.9	982.1
Repair Systems & Information Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	468.6	454.8	944.5	918.6
Financial services revenue \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	101.7	100.5	203.8	200.1
Other revenues
Disaggregation of Revenue [Line Items]
Net sales	8.5	7.4	16.3	14.5
Product and Services, Excluding Financial Services
Disaggregation of Revenue [Line Items]
Net sales	1,179.4	1,179.4	2,320.5	2,361.7
Product and Services, Excluding Financial Services \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	1,179.4	1,179.4	2,320.5	2,361.7
Product and Services, Excluding Financial Services \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	910.7	895.4	1,794.1	1,807.0
Product and Services, Excluding Financial Services \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	268.7	284.0	526.4	554.7
Product and Services, Excluding Financial Services \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	878.7	875.1	1,732.1	1,759.1
Product and Services, Excluding Financial Services \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	185.7	185.4	363.6	368.1
Product and Services, Excluding Financial Services \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	115.0	118.9	224.8	234.5
Product and Services, Excluding Financial Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	1,307.4	1,308.8	2,590.1	2,632.6
Product and Services, Excluding Financial Services \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(128.0)	(129.4)	(269.6)	(270.9)
Product and Services, Excluding Financial Services \| Commercial & Industrial Group
Disaggregation of Revenue [Line Items]
Net sales	289.2	305.0	565.9	596.0
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	347.8	372.0	691.7	731.9
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	289.2	305.0	565.9	596.0
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	20.5	21.0	39.5	41.3
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	268.7	284.0	526.4	554.7
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	150.7	163.5	291.3	312.1
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	78.0	76.8	155.1	157.8
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	60.5	64.7	119.5	126.1
Product and Services, Excluding Financial Services \| Commercial & Industrial Group \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(58.6)	(67.0)	(125.8)	(135.9)
Product and Services, Excluding Financial Services \| Snap-on Tools Group
Disaggregation of Revenue [Line Items]
Net sales	491.0	482.0	953.9	982.1
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	491.0	482.0	953.9	982.1
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	491.0	482.0	953.9	982.1
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	491.0	482.0	953.9	982.1
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	425.4	413.4	820.5	846.7
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	39.0	41.4	80.6	81.0
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	26.6	27.2	52.8	54.4
Product and Services, Excluding Financial Services \| Snap-on Tools Group \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Repair Systems & Information Group
Disaggregation of Revenue [Line Items]
Net sales	399.2	392.4	800.7	783.6
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	468.6	454.8	944.5	918.6
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	399.2	392.4	800.7	783.6
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	399.2	392.4	800.7	783.6
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	302.6	298.2	620.3	600.3
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	68.7	67.2	127.9	129.3
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	27.9	27.0	52.5	54.0
Product and Services, Excluding Financial Services \| Repair Systems & Information Group \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(69.4)	(62.4)	(143.8)	(135.0)
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Product and Services, Excluding Financial Services \| Financial services revenue \| Intersegment net 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	101.7	100.5	203.8	200.1
Financial services revenue \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	101.7	100.5	203.8	200.1
Financial services revenue \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Commercial & Industrial Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Snap-on Tools Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Repair Systems & Information Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	0.0	0.0	0.0	0.0
Financial services revenue \| Financial services revenue
Disaggregation of Revenue [Line Items]
Net sales	101.7	100.5	203.8	200.1
Financial services revenue \| Financial services revenue \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	$ 101.7	$ 100.5	$ 203.8	$ 200.1