Shareholders' Equity - Comprehensive Income (loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Summary of comprehensive income
Consolidated net income	$ 37.6	$ 47.0	$ 83.3	$ 85.4
Foreign currency translation adjustments	21.9	12.7	87.0	27.7
Pension liability adjustments, net of tax	1.7	0.6		1.2
Net comprehensive income	61.2	60.3	170.3	114.3
Less: Comprehensive income attributable to noncontrolling interests	0.7	0.6	1.9	0.9
Comprehensive income attributable to Bruker Corporation	$ 60.5	$ 59.7	$ 168.4	$ 113.4