Revenue - Disaggregation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues disaggregated by Group
Total revenue	$ 511.4	$ 521.1	$ 1,360.0	$ 1,472.7
Revenue recognized at a point in time
Revenues disaggregated by Group
Total revenue	442.2	463.8	1,174.0	1,310.2
Revenue recognized over time
Revenues disaggregated by Group
Total revenue	69.2	57.3	186.0	162.5
United States
Revenues disaggregated by Group
Total revenue	120.1	135.5	332.1	379.3
Germany
Revenues disaggregated by Group
Total revenue	50.4	57.7	134.9	150.1
Rest of Europe
Revenues disaggregated by Group
Total revenue	142.9	121.0	357.7	350.0
Asia Pacific
Revenues disaggregated by Group
Total revenue	160.0	158.5	433.3	464.5
Other
Revenues disaggregated by Group
Total revenue	38.0	48.4	102.0	128.8
Bruker BioSpin
Revenues disaggregated by Group
Total revenue	152.1	143.7	398.1	422.4
Bruker CALID
Revenues disaggregated by Group
Total revenue	171.3	158.2	444.5	446.9
Bruker Nano
Revenues disaggregated by Group
Total revenue	147.1	169.9	392.7	461.7
BEST
Revenues disaggregated by Group
Total revenue	43.8	52.5	134.8	152.2
Eliminations
Revenues disaggregated by Group
Total revenue	$ (2.9)	$ (3.2)	$ (10.1)	$ (10.5)