Business and Geographic Segments - Total Assets Held by Business Segments (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total assets	$ 2,967.2	$ 2,967.2	$ 3,170.5
Corporate and eliminations
Segment Reporting Information [Line Items]
Total assets	361.7	375.5	405.9
Chemicals
Segment Reporting Information [Line Items]
Total assets	2,016.0	1,984.8	2,401.1
Component Products
Segment Reporting Information [Line Items]
Total assets	85.5	83.1	82.3
Waste Management
Segment Reporting Information [Line Items]
Total assets	257.7	270.1	265.0
Real Estate Management And Development
Segment Reporting Information [Line Items]
Total assets	246.3	253.7
Joint venture accounted for by the equity method
Segment Reporting Information [Line Items]
Total assets			$ 16.2