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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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

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- Definition

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

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- Definition

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

+ References

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Acquisitions - Anasys (Details) - USD ($) $ in Millions		12 Months Ended
Acquisitions - Anasys (Details) - USD ($) $ in Millions	Apr. 08, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Acquisitions
Purchase price		$ 191.6	$ 66.3	$ 24.3
Anasys Instruments Corp
Acquisitions
Ownership percentage acquired	100.00%
Purchase price	$ 27.0
Contingent consideration	$ 5.3	$ 5.3
Anasys Instruments Corp \| Existing technology
Acquisitions
Amortization period for intangible assets acquired	8 years
Anasys Instruments Corp \| Customer relationships
Acquisitions
Amortization period for intangible assets acquired	8 years
Anasys Instruments Corp \| Backlog
Acquisitions
Amortization period for intangible assets acquired	1 year
Anasys Instruments Corp \| Trade names
Acquisitions
Amortization period for intangible assets acquired	8 years
Anasys Instruments Corp \| Maximum
Acquisitions
Contingent consideration	$ 9.6