Acquisitions - Impact of Business Acquisitions (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2019 USD ($) acquisition	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) acquisition	Jun. 30, 2018 USD ($)
Business Acquisition [Line Items]
Number of business acquisitions \| acquisition	2		2
Impact of Business Acquisitions [Abstract]
Revenues	$ 243.2	$ 220.2	$ 433.9	$ 338.0
Operating income (loss)	(7.0)	$ 66.8	(34.4)	$ 57.3
Adapt And PaxVax
Impact of Business Acquisitions [Abstract]
Revenues	88.2		163.1
Operating income (loss)	$ 8.2		$ 4.4

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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