Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to Bruker Corporation	$ 88.1	$ 87.1	$ 199.2	$ 201.4
Weighted average common shares outstanding:
Weighted average common shares outstanding-basic	147.8	151.4	149.1	151.5
Effect of dilutive securities:
Stock options and restricted stock units	0.8	1.4	0.8	1.5
Weighted-average number of common shares used in computing diluted net income per common share	148.6	152.8	149.9	153.0
Net income per common share attributable to Bruker Corporation shareholders:
Basic	$ 0.60	$ 0.58	$ 1.34	$ 1.33
Diluted	$ 0.59	$ 0.57	$ 1.33	$ 1.32