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Warranty Reserve
 3 Months Ended
Apr. 02, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Warranty Reserve
Warranty Reserve
Some of the Company’s products are subject to specified warranties, and the Company provides for the estimated cost of product warranties. The adequacy of the warranty reserve is assessed regularly, and the reserve is adjusted as necessary based on a review of historic warranty experience with respect to the applicable business or products, as well as the length and actual terms of the warranties. The warranty reserve is included in current and long-term accrued liabilities on the balance sheet.
 
First Quarter
Warranty Reserve (in millions):
2017
 
2016
Balance at beginning of year
$
18.4

 
$
17.1

Accruals for product warranties charged to expense
1.8

 
1.9

Cost of product warranty claims
(1.6
)
 
(1.6
)
Acquisition - e2v
3.0

 
—

Balance at end of period
$
21.6

 
$
17.4