Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Goodwill
Balance at the beginning of the period	$ 457.6	$ 339.5	$ 320.4
Current period additions/adjustments	109.1	131.9	30.0
Foreign currency impact	15.9	(13.8)	(10.9)
Balance at the end of the period	582.6	457.6	339.5
Asset Impairment	0.0	0.0	0.0
BSI BioSpin
Goodwill
Balance at the beginning of the period	57.8	42.4	30.8
Current period additions/adjustments	25.8	18.6	12.8
Foreign currency impact	2.9	(3.2)	(1.2)
Balance at the end of the period	86.5	57.8	42.4
BSI CALID
Goodwill
Balance at the beginning of the period	107.4	57.9	61.3
Current period additions/adjustments	83.8	55.3	0.6
Foreign currency impact	10.3	(5.8)	(4.0)
Balance at the end of the period	201.5	107.4	57.9
BSI NANO
Goodwill
Balance at the beginning of the period	292.1	238.9	228.0
Current period additions/adjustments	(0.5)	58.0	16.6
Foreign currency impact	2.7	(4.8)	(5.7)
Balance at the end of the period	294.3	292.1	238.9
BEST
Goodwill
Balance at the beginning of the period	0.3	0.3	0.3
Balance at the end of the period	$ 0.3	$ 0.3	$ 0.3