Earnings Per Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share
Net income attributable to Bruker Corporation, as reported	$ 22.9	$ 9.9	$ 28.3	$ 25.0
Weighted average shares outstanding:
Weighted average shares outstanding-basic	166.8	166.0	166.6	165.9
Effect of dilutive securities:
Stock options and restricted stock (in shares)	1.6	1.1	1.6	1.1
Weighted average shares outstanding-diluted	168.4	167.1	168.2	167.0
Net income per common share attributable to Bruker Corporation shareholders:
Basic and diluted (in dollars per share)	$ 0.14	$ 0.06	$ 0.17	$ 0.15
Stock options.
Anti-dilutive securities
Number of shares excluded from the computation of diluted earnings per share	0.3	0.7	0.3	0.2

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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