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Earnings (Loss) Per Share - Computation (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share [Abstract]        
Net (loss) income attributable to Bruker Corporation $ (59.6) $ 40.9 $ (34.6) $ 99.4
Dividends on Series A Mandatory Convertible Preferred Stock 2.8 0.0 2.8 0.0
Net (loss) income attributable to Burker Corporation common shareholders $ (62.4) $ 40.9 $ (37.4) $ 99.4
Weighted average common shares outstanding:        
Weighted average common shares outstanding - basic 151.8 151.5 151.7 148.1
Effect of dilutive securities:        
Stock options, restricted stock units, and employee stock purchase plan 0.0 0.5 0.0 0.6
Series A Mandatory Convertible Preferred Stock 0.0 0.0 0.0 0.0
Weighted average common shares outstanding - diluted 151.8 152.0 151.7 148.7
Net (loss) income per common share attributable to Bruker Corporation common shareholders:        
Basic $ (0.41) $ 0.27 $ (0.25) $ 0.67
Diluted $ (0.41) $ 0.27 $ (0.25) $ 0.67