v3.5.0.2
Discontinued Operations - Major Class of Assets and Liabilities Related to Discontinued Operations (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Non-current liabilities of discontinued operations $ 35.6 $ 45.3
Aromatics [Member] | Discontinued Operations Disposed of by Sale [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Receivables, net 17.6 47.8
Inventories 18.5 55.7
Prepaid expenses and other 0.8 0.7
Property, plant and equipment, net 61.1 103.3
Other assets, net 0.9 4.1
Total assets 98.9 211.6
Accounts payable 3.2 34.2
Accrued compensation 2.0 2.9
Other accrued liabilities 10.3 4.5
Non-current liabilities of discontinued operations 35.6 45.3
Total liabilities 51.1 86.9
Net assets $ 47.8 $ 124.7