Shareholders' Equity - Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Summary of comprehensive income (loss)
Consolidated net income	$ 58.7	$ 24.2	$ 116.5	$ 34.8
Foreign currency translation adjustments	14.3	27.1	(53.6)	3.9
Derivatives designated as hedging instruments, net of tax	0.4	(17.4)	48.8	(7.3)
Pension liability adjustments, net of tax		0.3	3.3	14.8
Net comprehensive income	73.4	34.2	115.0	46.2
Less: Comprehensive income attributable to noncontrolling interests	(0.7)	0.3	0.2	0.2
Less: Comprehensive income (loss) attributable to redeemable noncontrolling interest				(0.5)
Comprehensive income attributable to Bruker Corporation	$ 74.1	$ 33.9	$ 114.8	$ 46.5