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Business and Geographic Segments - Total Assets Held by Business Segments (Detail) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total assets	$ 2,794.4	$ 2,709.6	$ 2,907.5
Corporate and eliminations
Segment Reporting Information [Line Items]
Total assets	138.5	104.1	353.2
Chemicals | Operating Segment
Segment Reporting Information [Line Items]
Total assets	2,331.8	2,266.6	2,190.5
Component Products | Operating Segment
Segment Reporting Information [Line Items]
Total assets	132.5	120.4	104.9
Waste Management | Operating Segment
Segment Reporting Information [Line Items]
Total assets			52.0
Real Estate Management And Development | Operating Segment
Segment Reporting Information [Line Items]
Total assets	$ 191.6	$ 218.5	$ 206.9

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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+ References

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