Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net revenue	$ 530.5	$ 435.6	$ 414.9	$ 384.9	$ 470.3	$ 393.9	$ 371.7	$ 375.4	$ 1,765.9	$ 1,611.3	$ 1,623.8
Gross profit	255.2	198.0	183.4	176.4	220.4	185.2	170.1	166.8	813.0	742.5	708.6
Operating income	93.7	49.9	33.5	37.6	76.9	45.9	20.4	34.0	214.7	177.2	145.7
Net income (loss) attributable to Bruker Corporation	$ (3.4)	$ 37.0	$ 23.4	$ 21.6	$ 69.0	$ 46.5	$ 14.5	$ 23.6	$ 78.6	$ 153.6	$ 101.6
Net income (loss) per common share attributable to Bruker Corporation shareholders:
Basic (in dollars per share)	$ (0.02)	$ 0.23	$ 0.15	$ 0.14	$ 0.43	$ 0.29	$ 0.09	$ 0.14	$ 0.50	$ 0.95	$ 0.60
Diluted (in dollars per share)	$ (0.02)	$ 0.23	$ 0.15	$ 0.13	$ 0.43	$ 0.29	$ 0.09	$ 0.14	$ 0.49	$ 0.95	$ 0.60
Impairment of assets	$ 0.8			$ 0.3	$ 0.1		$ 0.7		$ 1.1	$ 0.8	$ 4.6
Gain on bargain purchase									$ 0.6	9.2
Incremental income tax provision	68.9
MERLIN Diagnostika GmbH
Net income (loss) per common share attributable to Bruker Corporation shareholders:
Gain on bargain purchase		$ 1.1
Adjustment to bargain purchase gain	$ 0.5
Oxford Instruments Superconducting Wire LLC
Net income (loss) per common share attributable to Bruker Corporation shareholders:
Gain on bargain purchase					$ 9.2					$ 9.2