Shareholders' Equity - Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Summary of comprehensive income (loss)
Consolidated net income	$ 30.7	$ 27.4
Foreign currency translation adjustments	(14.5)	24.8
Pension liability adjustments, net of tax	0.8	(0.4)
Net comprehensive income	17.0	51.8
Less: Comprehensive income attributable to noncontrolling interests	(0.1)	0.6
Comprehensive income attributable to Bruker Corporation	$ 17.1	$ 51.2