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Summary of Significant Accounting Policies (Details 6) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share.
Net income attributable to Bruker Corporation, as reported									$ 56.7	$ 80.1	$ 77.5
Weighted average shares outstanding:
Weighted average shares outstanding-basic									167.8	166.5	166.0
Effect of dilutive securities:
Stock options and restricted stock (in shares)									1.7	2.0	1.4
Weighted average shares outstanding-diluted									169.5	168.5	167.4
Net income per common share attributable to Bruker Corporation shareholders:
Basic (in dollars per share)	$ 0.16us-gaap_EarningsPerShareBasic	$ 0.03us-gaap_EarningsPerShareBasic	$ 0.10us-gaap_EarningsPerShareBasic	$ 0.05us-gaap_EarningsPerShareBasic	$ 0.21us-gaap_EarningsPerShareBasic	$ 0.10us-gaap_EarningsPerShareBasic	$ 0.14us-gaap_EarningsPerShareBasic	$ 0.03us-gaap_EarningsPerShareBasic	$ 0.34us-gaap_EarningsPerShareBasic	$ 0.48us-gaap_EarningsPerShareBasic	$ 0.47us-gaap_EarningsPerShareBasic
Diluted (in dollars per share)	$ 0.15us-gaap_EarningsPerShareDiluted	$ 0.03us-gaap_EarningsPerShareDiluted	$ 0.10us-gaap_EarningsPerShareDiluted	$ 0.05us-gaap_EarningsPerShareDiluted	$ 0.21us-gaap_EarningsPerShareDiluted	$ 0.10us-gaap_EarningsPerShareDiluted	$ 0.14us-gaap_EarningsPerShareDiluted	$ 0.03us-gaap_EarningsPerShareDiluted	$ 0.33us-gaap_EarningsPerShareDiluted	$ 0.48us-gaap_EarningsPerShareDiluted	$ 0.46us-gaap_EarningsPerShareDiluted
Stock options
Anti-dilutive securities
Number of shares excluded from the computation of diluted earnings per share									0.1	0.4	0.6