v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 29, 2018
Oct. 12, 2018
Document And Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 29, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
Trading Symbol SNA  
Entity Registrant Name SNAP-ON Inc  
CIK 0000091440  
Current Fiscal Year End Date --12-29  
Entity Filer Category Large Accelerated Filer  
Smaller Reporting Company false  
Emerging Growth Company false  
Entity Common Stock, Shares Outstanding (in shares)   56,175,480