Revenue from Contracts with Customers (Details 2) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018
Contract with Customer, Contract Liability [Roll Forward]
Beginning balance	$ 16.7	$ 13.5
Additions to sales incentive accrual	14.6	14.9
Contract payments	19.4	16.8
Foreign currency fluctuations	0.1	(0.2)
Ending balance	$ 12.0	$ 11.4

Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 55
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=108792157&loc=SL49130611-203046-203046

Name:	us-gaap_ContractWithCustomerRefundLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant