Revenue - Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues disaggregated by Group
Total revenue	$ 424.0	$ 461.4
Revenue recognized at a point in time
Revenues disaggregated by Group
Total revenue	367.7	410.5
Revenue recognized over time
Revenues disaggregated by Group
Total revenue	56.3	50.9
United States
Revenues disaggregated by Group
Total revenue	109.4	117.6
Germany
Revenues disaggregated by Group
Total revenue	40.9	42.8
Rest of Europe
Revenues disaggregated by Group
Total revenue	104.0	112.3
Asia Pacific
Revenues disaggregated by Group
Total revenue	137.2	152.2
Other
Revenues disaggregated by Group
Total revenue	32.5	36.5
Bruker BioSpin
Revenues disaggregated by Group
Total revenue	120.9	127.8
Bruker CALID
Revenues disaggregated by Group
Total revenue	140.5	148.2
Bruker Nano
Revenues disaggregated by Group
Total revenue	120.1	140.8
BEST
Revenues disaggregated by Group
Total revenue	46.2	47.8
Eliminations
Revenues disaggregated by Group
Total revenue	$ (3.7)	$ (3.2)