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Revenue Recognition - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Revenue from Contract with Customer [Abstract]        
Payments to representatives $ 12.7 $ 11.7 $ 34.4 $ 36.6
Extended product warranties, minimum length     6 months  
Extended product warranties, maximum length     10 years