XML 20 R37.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies - Changes In Accured Sales Returns (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Changes in Accrued Sales Returns [Roll Forward]  
Beginning balance $ 26.2
Ending balance 25.0
Sales Returns  
Changes in Accrued Sales Returns [Roll Forward]  
Beginning balance 39.3
Amounts accrued 29.0
Returns charged to accrual (29.9)
Ending balance $ 38.4