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Accrued Warranty Costs (Tables)
 6 Months Ended
Jun. 30, 2018
Product Warranties Disclosures [Abstract]  
Changes in product warranty liability
The following table presents changes in the Company’s product warranty liability for the six months ended June 30, 2018 and 2017:

 
2018
 
2017
 
(In millions)
January 1
$
7.9

 
$
7.1

Claims paid
(2.5
)
 
(1.6
)
Warranty expense
2.5

 
2.1

June 30
$
7.9

 
$
7.6