Stock-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	May 31, 2010
Stock-Based Compensation
Total stock-based compensation	$ 2.2	$ 2.0
Stock options
Stock-Based Compensation
Total stock-based compensation	1.8	1.6
Risk-free interest rate, minimum (as a percent)	1.58%	1.81%
Risk-free interest rate, maximum (as a percent)	1.71%	2.04%
Volatility, minimum (as a percent)	42.87%	55.50%
Volatility, maximum (as a percent)	52.23%	56.24%
Expected dividend yield (as a percent)	0.00%	0.00%
Stock options | Minimum
Stock-Based Compensation
Vesting period	3 years
Expected life	6 years	6 years
Stock options | Maximum
Stock-Based Compensation
Vesting period	5 years
Expected life	6 years 3 months 18 days	6 years 3 months 18 days
Restricted stock
Stock-Based Compensation
Total stock-based compensation	0.4	0.4
Bruker Corporation Stock Plan
Stock-Based Compensation
Common stock authorized for issuance (in shares)			8,000,000
Bruker Corporation Stock Plan | Minimum
Stock-Based Compensation
Vesting period	3 years
Bruker Corporation Stock Plan | Maximum
Stock-Based Compensation
Vesting period	5 years
Bruker Corporation Stock Plan | Stock options
Stock options, Number of Shares
Outstanding at the beginning of the period (in shares)	4,810,588
Granted (in shares)	106,824
Exercised (in shares)	(311,785)
Forfeited (in shares)	(47,361)
Outstanding at the end of the period (in shares)	4,558,266
Exercisable at the end of the period (in shares)	2,365,718
Exercisable and expected to vest at the end of the period (in shares)	4,431,098
Stock options, Weighted Average Option Price
Outstanding at the beginning of the period (in dollars per share)	$ 15.24
Granted (in dollars per share)	$ 19.19
Exercised (in dollars per share)	$ 11.18
Forfeited (in dollars per share)	$ 18.28
Outstanding at the end of the period (in dollars per share)	$ 15.58
Exercisable at the end of the period (in dollars per share)	$ 12.71
Exercisable and expected to vest at the end of the period (in dollars per share)	$ 15.49
Stock options, additional information
Weighted Average Remaining Contractual Term, Outstanding	6 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable	4 years 9 months 18 days
Weighted Average Remaining Contractual Term, Exercisable and expected to vest	6 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding	16.6
Aggregate Intrinsic Value, Exercisable	14.0
Aggregate Intrinsic Value, Exercisable and expected to vest	16.4
Fair value of the Company's common stock price (in dollars per share)	$ 18.47
Weighted average fair values of options granted (in dollars per share)	$ 8.70	$ 10.52
Intrinsic value of options exercised	2.4	3.8
Restricted stock, Weighted Average Grant Date Fair Value
Expected pre-tax stock-based compensation expense	17.3
Weighted average remaining service period	2 years 2 months 12 days
Bruker Corporation Stock Plan | Restricted stock
Restricted stock, Number of Shares
Outstanding at the beginning of the period (in shares)	309,725
Granted (in shares)	31,754
Vested (in shares)	(1,375)
Outstanding at the end of the period (in shares)	340,104
Restricted stock, Weighted Average Grant Date Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 17.20
Granted (in dollars per share)	$ 19.40
Vested (in dollars per share)	$ 16.57
Outstanding at the end of the period (in dollars per share)	$ 17.41
Total fair value of shares vested	0	0
Expected pre-tax stock-based compensation expense	$ 4.7
Weighted average remaining service period	3 years