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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 29, 2018
Commitments and Contingencies Disclosure [Abstract]  
Summary of Product Warranty Accrual Activity
Snap‑on’s product warranty accrual activity for the three and nine months ended September 29, 2018, and September 30, 2017, is as follows:
 
Three Months Ended
 
Nine Months Ended
(Amounts in millions)
September 29,
2018
 
September 30,
2017
 
September 29,
2018
 
September 30,
2017
Warranty reserve:
 
 
 
 
 
 
 
Beginning of period
$
17.5

 
$
18.9

 
$
17.2

 
$
16.0

Additions
3.0

 
1.1

 
10.9

 
10.4

Usage
(3.3
)
 
(2.2
)
 
(10.9
)
 
(8.6
)
End of period
$
17.2

 
$
17.8

 
$
17.2

 
$
17.8