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Restructuring Charges - Activity and Reserve Balance for Restructuring Charges by Segment (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 4.5	$ 4.1
Restructuring charges	9.4	13.2
Currency translation and other adjustments	(0.4)	(0.6)
Cash payments	(6.2)	(12.2)
Restructuring reserve, ending balance	$ 7.3	4.5
Document Period End Date	Jun. 30, 2019
Americas
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	$ 0.5	0.5
Restructuring charges	0.1	2.3
Currency translation and other adjustments	0.0	(0.3)
Cash payments	(0.2)	(2.0)
Restructuring reserve, ending balance	0.4	0.5
International
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	4.0	3.6
Restructuring charges	8.9	5.6
Currency translation and other adjustments	(0.4)	(0.3)
Cash payments	(5.6)	(4.9)
Restructuring reserve, ending balance	6.9	4.0
Corporate
Restructuring Reserve [Roll Forward]
Restructuring reserve, beginning balance	0.0	0.0
Restructuring charges	0.4	5.3
Currency translation and other adjustments	0.0	0.0
Cash payments	(0.4)	(5.3)
Restructuring reserve, ending balance	$ 0.0	$ 0.0

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- Definition

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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Restructuring Charges before Adjustments - Restructuring charges before any adjustments to the accrual.

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- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 17
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585

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- Definition

Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
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- Definition

Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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