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Segment information - Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information
Assets	$ 2,736.5	$ 2,469.0
Operating Segments
Segment Reporting Information
Assets	2,662.0	2,391.8
Operating Segments | Performance Materials
Segment Reporting Information
Assets	784.6	716.2
Operating Segments | Performance Chemicals
Segment Reporting Information
Assets	1,877.4	1,675.6
Corporate and other
Segment Reporting Information
Assets	$ 74.5	$ 77.2

X

- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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