Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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- Definition

The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
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Acquisitions - Alicona (Details) € in Millions, $ in Millions			12 Months Ended
	Dec. 17, 2018 EUR (€)	Dec. 17, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Acquisitions
Purchase price			$ 191.6	$ 66.3	$ 24.3
Agapetus GmbH
Acquisitions
Ownership percentage acquired	100.00%	100.00%
Purchase price	€ 48.9	$ 55.4
Agapetus GmbH \| Existing technology
Acquisitions
Amortization period for intangible assets acquired	8 years	8 years
Agapetus GmbH \| Customer relationships
Acquisitions
Amortization period for intangible assets acquired	8 years	8 years
Agapetus GmbH \| Backlog
Acquisitions
Amortization period for intangible assets acquired	1 year	1 year
Agapetus GmbH \| Trade names
Acquisitions
Amortization period for intangible assets acquired	12 years	12 years