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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2017
Accounting Policies [Abstract]  
Schedule of inventory, current
Inventories are stated at the lower of cost or market, determined by the first-in, first-out method, and consist of the following:
 
June 30,
 
December 31,
(in millions)
2017
 
2016
Finished goods
$
133.1

 
$
130.1

Work-in-process
10.4

 
10.7

Raw materials and supplies
51.0

 
56.0

 
$
194.5

 
$
196.8

Changes in accrued sales returns
The Company had the following activity for sales returns from December 31, 2016 to June 30, 2017:
(in millions)
 
Balance as of December 31, 2016
$
30.3

Amounts accrued
61.7

Returns charged to accrual
(59.3
)
Balance as of June 30, 2017
$
32.7

Warranty activity
The Company had the following activity for its accrued warranty expense from December 31, 2016 to June 30, 2017:
(in millions)
 
Balance as of December 31, 2016
$
29.9

Amounts accrued
23.0

Warranties charged to accrual
(13.6
)
Balance as of June 30, 2017
$
39.3