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Revenue Recognition - Narrative (Details)
$ in Millions
6 Months Ended
Jun. 30, 2019
USD ($)
product
Dec. 31, 2018
USD ($)
Disaggregation of Revenue [Line Items]    
Number of product categories | product 3  
Maximum payment term 360 days  
Period between delivery and receipt of payment 1 year  
Increase (decrease) in liabilities $ (389.5)  
Period between prepayment and performance of obligations 1 year  
Contract with customer, liability $ 68.9 $ 458.4
Minimum    
Disaggregation of Revenue [Line Items]    
Contract payment term 30 days  
Maximum    
Disaggregation of Revenue [Line Items]    
Contract payment term 90 days