XML 159 R130.htm IDEA: XBRL DOCUMENT v3.25.0.1
Segment information - Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information    
Assets $ 2,022.6 $ 2,623.3
Operating Segments    
Segment Reporting Information    
Assets 1,959.6 2,554.1
Operating Segments | Performance Materials    
Segment Reporting Information    
Assets 781.6 738.0
Operating Segments | Performance Chemicals    
Segment Reporting Information    
Assets 613.0 1,218.1
Operating Segments | Advanced Polymer Technologies segment    
Segment Reporting Information    
Assets 565.0 598.0
Corporate and other    
Segment Reporting Information    
Assets $ 63.0 $ 69.2