Shareholders' Equity - Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Summary of comprehensive income (loss)
Consolidated net income	$ 61.5	$ 44.2	$ 129.2	$ 103.1
Foreign currency translation adjustments	(36.5)	(2.5)	(38.9)	(17.1)
Pension liability adjustments, net of tax	1.1	0.2	1.7	2.3
Net comprehensive income (loss)	26.1	41.9	92.0	88.3
Less: Comprehensive income (loss) attributable to noncontrolling interests	0.2	0.5	1.0	0.9
Less: Comprehensive income (loss) attributable to redeemable noncontrolling interest	(1.2)		(1.8)
Comprehensive income (loss) attributable to Bruker Corporation	$ 27.1	$ 41.4	$ 92.8	$ 87.4