Financial Instruments, Risk Management and Fair Value Measurements - Derivatives Not Designated As Cash Flow Hedging Instruments (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Derivative [Line Items]
Amount of pre-tax gain or (loss) recognized in income on derivatives	$ (0.8)	$ 0.1	$ (1.9)	$ (0.9)
Foreign Exchange contracts \| Cost of Sales and Services
Derivative [Line Items]
Amount of pre-tax gain or (loss) recognized in income on derivatives	$ (0.8)	$ 0.1	$ (1.9)	$ (0.9)

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959

Name:	us-gaap_DerivativeGainLossOnDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration