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Exit and Disposal Activities - Components of Exit and Disposal Accrual Activity (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Sep. 27, 2014
Jun. 28, 2014
Restructuring Cost and Reserve [Line Items]    
Beginning Balance $ 6.2 $ 4.0
Provision 2.0 3.4
Usage (1.3) (1.2)
Ending Balance 6.9 6.2
Severance Costs [Member] | Commercial & Industrial Group [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance 1.0 1.5
Provision 0.9  
Usage (0.3) (0.5)
Ending Balance 1.6 1.0
Severance Costs [Member] | Snap-on Tools Group [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance 0.1 0.2
Usage (0.1) (0.1)
Ending Balance   0.1
Severance Costs [Member] | Repair Systems & Information Group [Member]
    
Restructuring Cost and Reserve [Line Items]    
Beginning Balance 5.1 2.3
Provision 1.1 3.4
Usage (0.9) (0.6)
Ending Balance $ 5.3 $ 5.1