Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income
Consolidated net income	$ 5.7	$ 15.1
Foreign currency translation adjustments	(29.6)	18.8
Unrealized losses on interest rate swap:
Unrealized holding losses arising during the period		(0.2)
Less reclassification adjustments for settlements included in the determination of net income		0.5
Pension liability adjustments	1.0	(0.6)
Net comprehensive income (loss)	(22.9)	33.6
Less: Comprehensive income attributable to noncontrolling interests	0.3	0.1
Comprehensive income (loss) attributable to Bruker Corporation	(23.2)	33.5
Foreign Currency Translation:
Balance at beginning of period	170.3
Other comprehensive income (loss) before reclassifications	(29.6)
Net current period other comprehensive income (loss)	(29.6)	18.8
Balance at end of period	140.7
Pension Liability Adjustment
Balance at beginning of period	(32.5)
Other comprehensive income (loss) before reclassifications	0.6
Realized loss on reclassification	0.4
Net current period other comprehensive income (loss)	1.0	(0.6)
Balance at end of period	(31.5)
Accumulated Other Comprehensive Income
Balance at beginning of period	137.8
Other comprehensive income (loss) before reclassifications	(29.0)
Realized loss on reclassification	0.4
Net current period other comprehensive income (loss)	(28.6)
Balance at end of period	109.2
Realized loss on reclassification, tax	$ 0.1