Revenue Recognition - Schedule of Revenue Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2026	Jun. 28, 2025	Jul. 04, 2026	Jun. 28, 2025
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,225.8	$ 1,170.9	$ 2,423.8	$ 2,304.2
Net sales	1,334.8	1,281.1	2,643.1	2,524.3
Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(149.8)	(128.0)	(294.9)	(269.6)
Commercial & Industrial Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	395.8	347.8	776.8	691.7
Snap-on Tools Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	508.8	491.0	994.8	953.9
Repair Systems & Information Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	480.3	468.6	965.6	944.5
Financial Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	99.7	101.7	200.8	203.8
Other revenues
Disaggregation of Revenue [Line Items]
Net sales	9.3	8.5	18.5	16.3
Product and Services, excluding Financial Services
Disaggregation of Revenue [Line Items]
Net sales	1,235.1	1,179.4	2,442.3	2,320.5
Product and Services, excluding Financial Services \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	1,235.1	1,179.4	2,442.3	2,320.5
Product and Services, excluding Financial Services \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	930.8	910.7	1,849.7	1,794.1
Product and Services, excluding Financial Services \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	304.3	268.7	592.6	526.4
Product and Services, excluding Financial Services \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	903.4	878.7	1,773.3	1,732.1
Product and Services, excluding Financial Services \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	200.7	185.7	415.9	363.6
Product and Services, excluding Financial Services \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	131.0	115.0	253.1	224.8
Product and Services, excluding Financial Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	1,384.9	1,307.4	2,737.2	2,590.1
Product and Services, excluding Financial Services \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(149.8)	(128.0)	(294.9)	(269.6)
Product and Services, excluding Financial Services \| Commercial & Industrial Group
Disaggregation of Revenue [Line Items]
Net sales	325.5	289.2	634.3	565.9
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	395.8	347.8	776.8	691.7
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	325.5	289.2	634.3	565.9
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	21.2	20.5	41.7	39.5
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| All other professionals
Disaggregation of Revenue [Line Items]
Net sales	304.3	268.7	592.6	526.4
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| North America
Disaggregation of Revenue [Line Items]
Net sales	167.7	150.7	322.2	291.3
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	87.8	78.0	178.5	155.1
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	70.0	60.5	133.6	119.5
Product and Services, excluding Financial Services \| Commercial & Industrial Group \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(70.3)	(58.6)	(142.5)	(125.8)
Product and Services, excluding Financial Services \| Snap-on Tools Group
Disaggregation of Revenue [Line Items]
Net sales	508.8	491.0	994.8	953.9
Product and Services, excluding Financial Services \| Snap-on Tools Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	508.8	491.0	994.8	953.9
Product and Services, excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	508.8	491.0	994.8	953.9
Product and Services, excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	508.8	491.0	994.8	953.9
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	437.8	425.4	846.0	820.5
Product and Services, excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	40.2	39.0	87.2	80.6
Product and Services, excluding Financial Services \| Snap-on Tools Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	30.8	26.6	61.6	52.8
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	400.8	399.2	813.2	800.7
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	480.3	468.6	965.6	944.5
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales
Disaggregation of Revenue [Line Items]
Net sales	400.8	399.2	813.2	800.7
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| Vehicle service professionals
Disaggregation of Revenue [Line Items]
Net sales	400.8	399.2	813.2	800.7
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	297.9	302.6	605.1	620.3
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| Europe
Disaggregation of Revenue [Line Items]
Net sales	72.7	68.7	150.2	127.9
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Operating Segments \| External Sales \| All other
Disaggregation of Revenue [Line Items]
Net sales	30.2	27.9	57.9	52.5
Product and Services, excluding Financial Services \| Repair Systems & Information Group \| Intersegment net sales
Disaggregation of Revenue [Line Items]
Net sales	(79.5)	(69.4)	(152.4)	(143.8)
Product and Services, excluding Financial Services \| Financial Services \| 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 \| 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 \| 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 \| 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 \| 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 \| 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 \| 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 \| 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	99.7	101.7	200.8	203.8
Financial services revenue \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	99.7	101.7	200.8	203.8
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
Disaggregation of Revenue [Line Items]
Net sales	99.7	101.7	200.8	203.8
Financial services revenue \| Financial Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Net sales	$ 99.7	$ 101.7	$ 200.8	$ 203.8