XML 66 R50.htm IDEA: XBRL DOCUMENT v3.10.0.1
Summary of Significant Accounting Policies - Changes in Accrued Sales Returns (Details) - USD ($)
$ in Millions
 12 Months Ended
Jan. 01, 2019
Dec. 31, 2018
Dec. 31, 2017
Changes in Accrued Sales Returns [Roll Forward]      
Beginning balance $ 34.3 $ 30.0 $ 30.3
Amounts accrued   83.8 81.6
Returns charged to accrual   (81.2) (81.9)
Reclassification and remeasurement of sales return asset under Topic 606 $ 1.7    
Ending balance   $ 34.3 $ 30.0