Revenue - Disaggregation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues disaggregated by Group
Total revenue	$ 2,417.9	$ 1,987.5	$ 2,072.6
Revenue recognized at a point in time
Revenues disaggregated by Group
Total revenue	2,104.7	1,726.7	1,847.4
Revenue recognized over time
Revenues disaggregated by Group
Total revenue	313.2	260.8	225.2
Eliminations
Revenues disaggregated by Group
Total revenue	(14.0)	(12.0)	(14.9)
Operating segments | Bruker BioSpin
Revenues disaggregated by Group
Total revenue	691.0	600.0	621.4
Operating segments | Bruker CALID
Revenues disaggregated by Group
Total revenue	819.6	653.9	623.5
Operating segments | BSI NANO
Revenues disaggregated by Group
Total revenue	697.5	556.1	632.7
Operating segments | BEST
Revenues disaggregated by Group
Total revenue	$ 223.8	$ 189.5	$ 209.9