Exit And Disposal Activities (Components Of Exit And Disposal Accrual Activity) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Restructuring Cost and Reserve [Line Items]
Beginning Balance	$ 10.5	$ 13.4
Provision	8.2	10.0
Usage	(10.3)	(12.9)
Ending Balance	8.4	10.5
Severance Costs [Member] | Commercial & Industrial Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	2.8	4.8
Provision	4.3	3.0
Usage	(3.5)	(5.0)
Ending Balance	3.6	2.8
Severance Costs [Member] | Snap-On Tools Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	3.5	1.7
Provision	1.8	2.8
Usage	(4.7)	(1.0)
Ending Balance	0.6	3.5
Severance Costs [Member] | Repair Systems & Information Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	3.3	5.8
Provision	2.1	3.2
Usage	(1.6)	(5.7)
Ending Balance	3.8	3.3
Severance Costs [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.2
Provision		0.2
Usage	(0.2)
Ending Balance		0.2
Facility-Related Costs [Member] | Commercial & Industrial Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.5	0.7
Usage	(0.1)	(0.2)
Ending Balance	0.4	0.5
Facility-Related Costs [Member] | Snap-On Tools Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance	0.2	0.4
Provision		0.8
Usage	(0.2)	(1.0)
Ending Balance		0.2
Facility-Related Costs [Member] | Repair Systems & Information Group [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Provision
Usage
Ending Balance
Facility-Related Costs [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Beginning Balance
Provision
Usage
Ending Balance