Shareholders' Equity - Comprehensive Income (loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Summary of comprehensive income (loss)
Consolidated net income	$ 31.5	$ 24.0	$ 58.9	$ 45.7
Foreign currency translation adjustments	(39.4)	49.5	(14.6)	65.1
Pension liability adjustments, net of tax	2.5	(1.9)	2.1	(1.7)
Net comprehensive income	(5.4)	71.6	46.4	109.1
Less: Comprehensive income (loss) attributable to noncontrolling interests	(0.2)	1.0	0.4	1.2
Comprehensive income (loss) attributable to Bruker Corporation	$ (5.2)	$ 70.6	$ 46.0	$ 107.9

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income (loss) and other comprehensive income (loss), attributable to noncontrolling interests. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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