Business Segment Information - Information by Geographical Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue and property, plant and equipment by geographical area
Total revenue	$ 2,964.5	$ 2,530.7	$ 2,417.9
Long-lived assets	691.5	538.2	466.0
United States
Revenue and property, plant and equipment by geographical area
Total revenue	777.7	696.1	601.0
Long-lived assets	124.9	58.8	51.3
Germany
Revenue and property, plant and equipment by geographical area
Total revenue	281.5	247.4	262.6
Long-lived assets	350.2	309.6	244.0
Switzerland
Revenue and property, plant and equipment by geographical area
Long-lived assets	127.0	98.5	96.3
Rest of Europe
Revenue and property, plant and equipment by geographical area
Total revenue	699.7	591.9	658.1
Long-lived assets	57.4	42.5	45.2
China
Revenue and property, plant and equipment by geographical area
Total revenue	528.1	396.5	357.6
Asia Pacific
Revenue and property, plant and equipment by geographical area
Total revenue	460.9	408.4	371.5
Long-lived assets	22.1	22.1	22.6
Other
Revenue and property, plant and equipment by geographical area
Total revenue	216.6	190.4	167.1
Long-lived assets	$ 9.9	$ 6.7	$ 6.6