Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share [Abstract]
Net income attributable to Bruker Corporation, as reported	$ 277.1	$ 157.8	$ 197.2
Weighted average shares outstanding:
Weighted average shares outstanding-basic	151.4	153.4	155.2
Effect of dilutive securities:
Stock options and restricted stock awards and units (in shares)	1.5	1.2	1.4
Weighted-average number of common shares used in computing diluted net income per common share	152.9	154.6	156.6
Net income per common share attributable to Bruker Corporation shareholders:
Basic (in dollars per share)	$ 1.83	$ 1.03	$ 1.27
Diluted (in dollars per share)	$ 1.81	$ 1.02	$ 1.26