Geographic Information - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018	Sep. 30, 2019 USD ($) segment	Sep. 30, 2018	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of operating segments | segment			1
Concentration Risk [Line Items]
Accounts receivable	$ 758.3		$ 758.3		$ 651.8
Product Sales
Concentration Risk [Line Items]
Accounts receivable	$ 124.5		$ 124.5		$ 96.4
Customer Concentration Risk | Revenue | Single Customer
Concentration Risk [Line Items]
Concentration risk	15.90%	11.10%	13.40%	11.50%