Shareholders' Equity - Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Summary of comprehensive income (loss)
Consolidated net income	$ 44.2	$ 37.6	$ 103.1	$ 83.3
Foreign currency translation adjustments	(2.5)	21.9	(17.1)	87.0
Pension liability adjustments, net of tax	0.2	1.7	2.3
Net comprehensive income	41.9	61.2	88.3	170.3
Less: Comprehensive income attributable to noncontrolling interests	0.5	0.7	0.9	1.9
Comprehensive income attributable to Bruker Corporation	$ 41.4	$ 60.5	$ 87.4	$ 168.4