Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Earnings Per Share [Abstract]
Net income attributable to Bruker Corporation	$ 88.1	$ 88.1	$ 221.7	$ 199.2
Weighted average common shares outstanding:
Weighted average common shares outstanding - basic	146.6	147.8	146.7	149.1
Effect of dilutive securities:
Stock options and restricted stock units	0.7	0.8	0.8	0.8
Weighted average common shares outstanding - diluted	147.3	148.6	147.5	149.9
Net income per common share attributable to Bruker Corporation shareholders:
Basic	$ 0.6	$ 0.6	$ 1.51	$ 1.34
Diluted	$ 0.6	$ 0.59	$ 1.5	$ 1.33