Revenue - Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues disaggregated by Group
Total revenue	$ 570.8	$ 424.6	$ 1,125.5	$ 848.6
Revenue recognized at a point in time
Revenues disaggregated by Group
Total revenue	492.2	364.1	972.2	731.8
Revenue recognized over time
Revenues disaggregated by Group
Total revenue	78.6	60.5	153.3	116.8
United States
Revenues disaggregated by Group
Total revenue	159.8	102.6	278.8	212.0
Germany
Revenues disaggregated by Group
Total revenue	60.8	43.6	130.9	84.5
Rest of Europe
Revenues disaggregated by Group
Total revenue	154.7	110.8	304.5	214.8
Asia Pacific
Revenues disaggregated by Group
Total revenue	153.7	136.1	334.2	273.3
Other
Revenues disaggregated by Group
Total revenue	41.8	31.5	77.1	64.0
Bruker BioSpin
Revenues disaggregated by Group
Total revenue	148.5	125.1	307.9	246.0
Bruker CALID
Revenues disaggregated by Group
Total revenue	193.3	132.7	385.7	273.2
Bruker Nano
Revenues disaggregated by Group
Total revenue	175.3	125.5	329.7	245.6
BEST
Revenues disaggregated by Group
Total revenue	56.6	44.8	109.0	91.0
Eliminations
Revenues disaggregated by Group
Total revenue	$ (2.9)	$ (3.5)	$ (6.8)	$ (7.2)