Revenue - Disaggregation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($)
Revenues disaggregated by Group
Revenue	$ 1,895.6
Revenue recognized at a point in time
Revenues disaggregated by Group
Revenue	1,716.8
Revenue recognized over time
Revenues disaggregated by Group
Revenue	178.8
Bruker BioSpin
Revenues disaggregated by Group
Revenue	591.1
Bruker CALID
Revenues disaggregated by Group
Revenue	547.8
Bruker Nano
Revenues disaggregated by Group
Revenue	568.1
BEST
Revenues disaggregated by Group
Revenue	194.8
Eliminations
Revenues disaggregated by Group
Revenue	$ (6.2)