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Business Segment and Geographic Information - Summary (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Amount	$ 462.8	$ 396.3	$ 336.4	$ 280.5	$ 338.0	$ 266.7	$ 242.5	$ 184.4	$ 1,476.0	$ 1,031.6	$ 718.5
% of Total									100.00%	100.00%	100.00%
Distributor
Segment Reporting Information [Line Items]
Amount									$ 1,011.6	$ 652.9	$ 538.0
% of Total									69.00%	63.00%	75.00%
Direct
Segment Reporting Information [Line Items]
Amount									$ 464.4	$ 378.7	$ 180.5
% of Total									31.00%	37.00%	25.00%
United States
Segment Reporting Information [Line Items]
Amount									$ 1,161.5	$ 818.4	$ 596.2
% of Total									79.00%	79.00%	83.00%
Outside of the United States
Segment Reporting Information [Line Items]
Amount									$ 314.5	$ 213.2	$ 122.3
% of Total									21.00%	21.00%	17.00%

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

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