Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share
Net income attributable to Bruker Corporation, as reported -basic									$ 101.6	$ 56.7	$ 80.1
Net income attributable to Bruker Corporation, as reported -diluted									$ 101.6	$ 56.7	$ 80.1
Weighted average shares outstanding:
Weighted average shares outstanding-basic									168.2	167.8	166.5
Effect of dilutive securities:
Stock options and restricted stock units (in shares)									0.9	1.7	2.0
Weighted average shares outstanding-diluted									169.1	169.5	168.5
Net income per common share attributable to Bruker Corporation shareholders:
Basic (in dollars per share)	$ 0.37	$ 0.07	$ 0.13	$ 0.04	$ 0.16	$ 0.03	$ 0.10	$ 0.05	$ 0.60	$ 0.34	$ 0.48
Diluted (in dollars per share)	$ 0.36	$ 0.07	$ 0.13	$ 0.04	$ 0.15	$ 0.03	$ 0.10	$ 0.05	$ 0.60	$ 0.33	$ 0.48