Acquisitions - 2017, Consideration (Details) € in Millions, $ in Millions								12 Months Ended
	Sep. 20, 2017 USD ($)	Aug. 02, 2017 USD ($)	Aug. 01, 2017 USD ($)	May 05, 2017 EUR (€)	May 05, 2017 USD ($)	Jan. 23, 2017 USD ($)	Jan. 02, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Acquisitions
Cash Consideration								$ 66.3	$ 24.3	$ 28.6
2017 Acquisitions
Acquisitions
Consideration								71.3
Cash Consideration								$ 66.3
InVivo Biotech Svs GmbH
Acquisitions
Consideration							$ 9.1
Cash Consideration							9.1
SCIILs GmbH
Acquisitions
Consideration							3.1
Cash Consideration							$ 3.1
Hysitron, Incorporated
Acquisitions
Consideration						$ 28.8
Cash Consideration						$ 27.2
Luxendo GmbH
Acquisitions
Consideration					$ 21.9
Cash Consideration				€ 17	$ 18.8
XGLab S.r.l.
Acquisitions
Consideration			$ 5.5
Cash Consideration			$ 5.5
the pTD ePaTOX II business of Analytik Jena AG
Acquisitions
Consideration		$ 0.4
Cash Consideration		$ 0.4
MERLIN Diagnostika GmbH
Acquisitions
Consideration	$ 2.5
Cash Consideration	$ 2.2