Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Accumulated Other Comprehensive Income (Loss)
Consolidated net income	$ 20.1	$ 27.9	$ 54.4	$ 66.8
Foreign currency translation adjustments	(52.0)	53.3	9.2	2.6
Unrealized losses on interest rate swap:
Unrealized holding losses arising during the period		(0.7)	(0.3)	(2.2)
Less reclassification adjustments for settlements included in the determination of net income	0.6	0.6	1.6	2.0
Pension liability adjustments	1.6	(2.0)	(0.6)	(1.6)
Net comprehensive income (loss)	(29.7)	79.1	64.3	67.6
Less: Comprehensive income attributable to noncontrolling interests		0.1	0.1
Comprehensive income (loss) attributable to Bruker Corporation	$ (29.7)	$ 79.0	$ 64.2	$ 67.6