Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share
Net income attributable to Bruker Corporation, as reported	$ 61.6	$ 56.7
Weighted average shares outstanding:
Weighted average shares outstanding-basic	150.4	151.8
Effect of dilutive securities:
Stock options and restricted stock units (in shares)	1.0	1.4
Weighted-average number of common shares used in computing diluted net income per common share	151.4	153.2
Net income per common share attributable to Bruker Corporation shareholders:
Basic	$ 0.41	$ 0.37
Diluted	$ 0.41	$ 0.37