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Postretirement Plans (Tables) (Other Postretirement Benefit Plans, Defined Benefit [Member])
12 Months Ended
Jan. 03, 2015
Other Postretirement Benefit Plans, Defined Benefit [Member]
 
Summary of Weighted-Average Assumptions Used to Determine Accumulated Benefit Obligation
The weighted-average discount rate used to determine Snap-on’s accumulated benefit obligation is as follows:   
          2014                  2013                

Discount rate

     3.6%                4.2%