Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income attributable to Bruker Corporation	$ 49.5	$ 57.6	$ 111.1	$ 114.3
Weighted average shares outstanding:
Weighted average shares outstanding-basic	149.0	151.3	149.7	151.6
Effect of dilutive securities:
Stock options and restricted stock units	0.8	1.6	0.9	1.4
Weighted-average number of common shares used in computing diluted net income per common share	149.8	152.9	150.6	153.0
Net income per common share attributable to Bruker Corporation shareholders:
Basic	$ 0.33	$ 0.38	$ 0.74	$ 0.75
Diluted	$ 0.33	$ 0.38	$ 0.74	$ 0.75