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.

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Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

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Acquisitions - JPK (Details) € in Millions, $ in Millions			12 Months Ended
Acquisitions - JPK (Details) € in Millions, $ in Millions	Jul. 11, 2018 EUR (€)	Jul. 11, 2018 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Acquisitions
Purchase price			$ 90.0	$ 191.6	$ 66.3
JPK Instruments AG
Acquisitions
Ownership percentage acquired	100.00%	100.00%
Purchase price	€ 14.2	$ 16.6
Contingent consideration		$ 4.3		$ 4.3
Amortization period for intangible assets acquired	8 years	8 years
JPK Instruments AG \| Customer relationships
Acquisitions
Amortization period for intangible assets acquired	8 years	8 years
JPK Instruments AG \| Backlog
Acquisitions
Amortization period for intangible assets acquired	1 year	1 year
JPK Instruments AG \| Existing technology
Acquisitions
Amortization period for intangible assets acquired	8 years	8 years