Shareholders' Equity - Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Summary of comprehensive income (loss)
Consolidated net income	$ 37.0	$ 31.5	$ 67.7	$ 58.9
Foreign currency translation adjustments	12.7	(39.4)	(2.4)	(14.6)
Pension liability adjustments, net of tax	(0.2)	2.5	0.6	2.1
Net comprehensive income (loss)	49.5	(5.4)	65.9	46.4
Less: Comprehensive income (loss) attributable to noncontrolling interests	0.9	(0.2)	0.8	0.4
Less: Comprehensive income (loss) attributable to redeemable noncontrolling interest			(0.6)
Comprehensive income (loss) attributable to Bruker Corporation	$ 48.6	$ (5.2)	$ 65.7	$ 46.0