Business and Geographic Segments - Total Assets Held by Business Segments (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total assets	$ 3,005.2	$ 2,889.3	$ 2,794.4
Corporate and eliminations
Segment Reporting Information [Line Items]
Total assets	226.4	179.3	138.5
Chemicals | Operating Segment
Segment Reporting Information [Line Items]
Total assets	2,373.1	2,400.7	2,331.8
Component Products | Operating Segment
Segment Reporting Information [Line Items]
Total assets	146.4	138.0	132.5
Real Estate Management And Development | Operating Segment
Segment Reporting Information [Line Items]
Total assets	$ 259.3	$ 171.3	$ 191.6