Business and Geographic Segments - Total Assets Held by Business Segments (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 2,443.2	$ 2,537.4	$ 2,945.2
Corporate and eliminations
Segment Reporting Information [Line Items]
Total assets	366.9	366.3	357.1
Chemicals | Operating Segment
Segment Reporting Information [Line Items]
Total assets	1,548.9	1,617.6	2,001.2
Component Products | Operating Segment
Segment Reporting Information [Line Items]
Total assets	97.9	88.7	83.1
Waste Management | Operating Segment
Segment Reporting Information [Line Items]
Total assets	228.6	231.9	257.7
Real Estate Management And Development | Operating Segment
Segment Reporting Information [Line Items]
Total assets	$ 200.9	$ 232.9	$ 246.1