Business and Geographic Segments - Total Assets Held by Business Segments (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 2,537.4	$ 2,945.2	$ 2,951.7
Corporate and eliminations
Segment Reporting Information [Line Items]
Total assets	366.3	357.1	371.6
Chemicals
Segment Reporting Information [Line Items]
Total assets	1,617.6	2,001.2	1,975.8
Component Products
Segment Reporting Information [Line Items]
Total assets	88.7	83.1	80.6
Waste Management
Segment Reporting Information [Line Items]
Total assets	231.9	257.7	270.1
Real Estate Management And Development
Segment Reporting Information [Line Items]
Total assets	$ 232.9	$ 246.1	$ 253.6