Shareholders' Equity - Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Summary of comprehensive income (loss)
Consolidated net income	$ 55.3	$ 61.5	$ 90.1	$ 129.2
Foreign currency translation adjustments	8.6	(36.5)	5.1	(38.9)
Pension liability adjustments, net of tax	0.1	1.1	14.9	1.7
Net comprehensive income	64.0	26.1	110.1	92.0
Less: Comprehensive income attributable to noncontrolling interests	1.4	0.2	1.5	1.0
Less: Comprehensive income (loss) attributable to redeemable noncontrolling interest		(1.2)	(0.5)	(1.8)
Comprehensive income attributable to Bruker Corporation	$ 62.6	$ 27.1	$ 109.1	$ 92.8