Segments (Assets by Segment) (Details) (USD $) In Millions	Jul. 02, 2011	Jan. 01, 2011
Total assets from reportable segments	$ 3,205.3	$ 3,080.2
Corporate	673.2	697.8
Elimination of intersegment receivables	(52.0)	(48.6)
Total assets	3,826.5	3,729.4
Commercial and Industrial Group [Member]
Total assets from reportable segments	961.6	875.5
Snap-on Tools Group [Member]
Total assets from reportable segments	461.4	424.7
Repair Systems and Information Group [Member]
Total assets from reportable segments	950.6	929.4
Financial Services [Member]
Total assets from reportable segments	$ 831.7	$ 850.6