Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Narrative (Details)

v3.19.3
Revenue Recognition - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2019
segment
Sep. 30, 2019
product_category
segment
Disaggregation of Revenue [Line Items]    
Refund period   90 days
Number of principal categories of products | product_category   6
Number of business segments | segment 4 4
Maximum    
Disaggregation of Revenue [Line Items]    
Contract with customer, contract term   1 year