Revenue - Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues disaggregated by Group
Revenue	$ 490.2	$ 443.7	$ 951.6	$ 875.4
Revenue recognized at a point in time
Revenues disaggregated by Group
Revenue	435.9	405.3	846.4	800.5
Revenue recognized over time
Revenues disaggregated by Group
Revenue	54.3	38.4	105.2	74.9
United States
Revenues disaggregated by Group
Revenue	126.2	108.4	243.8	213.2
Germany
Revenues disaggregated by Group
Revenue	49.6	48.9	92.4	90.4
Rest of Europe
Revenues disaggregated by Group
Revenue	116.7	111.9	229.0	231.8
Asia Pacific
Revenues disaggregated by Group
Revenue	153.8	135.5	306.0	262.4
Other
Revenues disaggregated by Group
Revenue	43.9	39.0	80.4	77.6
Bruker BioSpin
Revenues disaggregated by Group
Revenue	150.9	139.9	278.7	271.7
Bruker CALID
Revenues disaggregated by Group
Revenue	140.5	128.0	288.7	259.3
Bruker Nano
Revenues disaggregated by Group
Revenue	151.0	134.5	291.8	258.4
BEST
Revenues disaggregated by Group
Revenue	51.9	42.7	99.7	88.3
Eliminations
Revenues disaggregated by Group
Revenue	$ (4.1)	$ (1.4)	$ (7.3)	$ (2.3)