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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of inventory Inventories are stated at the lower of cost and net realizable value, determined by the first-in, first-out method, and consist of the following:
September 30,December 31,
(in millions)20202019
Finished goods$139.4 $157.4 
Work-in-process12.1 10.8 
Raw materials and supplies124.1 92.3 
 $275.6 $260.5 
Changes in accrued sales returns
The Company had the following activity for sales returns from December 31, 2019 to September 30, 2020:
(in millions)
Balance as of December 31, 2019$39.3 
Amounts accrued81.6 
Returns charged to accrual(78.8)
Balance as of September 30, 2020$42.1 
Warranty activity
The Company had the following activity for its accrued warranty expense from December 31, 2019 to September 30, 2020:
(in millions)
Balance as of December 31, 2019$41.6 
Amounts accrued15.9 
Warranties charged to accrual(15.7)
Balance as of September 30, 2020$41.8 
Schedule of New Accounting Pronouncements and Changes in Accounting Principles
The Company had the following activity for its allowance for credit losses from December 31, 2019 to September 30, 2020:

(in millions)
Balance as of December 31, 2019
$71.9 
ASU 2016-13 adoption impact8.9 
Amounts accrued32.8 
Write-offs charged against the allowance(17.0)
Balance as of September 30, 2020
$96.6