Revenue - Schedule of Contract Asset and Liability (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Revenue from Contract with Customer [Abstract]
Accounts receivable	$ 139.7	$ 139.3
Contract asset	10.3	11.4	$ 10.8	$ 12.2
Contract liability	$ (16.3)	$ (19.1)	$ (16.5)	$ (20.5)

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant