Investment in Affiliate and Other Assets - Investment in Affiliates and Other Assets (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Other Noncurrent Assets [Line Items]
Investment in Ti02 manufacturing joint venture	$ 89,000,000	$ 102,300,000
Other assets:
Land held for development	165,100,000us-gaap_RealEstateInvestmentPropertyNet	158,100,000us-gaap_RealEstateInvestmentPropertyNet
Waste disposal site operating permits, net	53,200,000us-gaap_OtherDeferredCostsNet	59,500,000us-gaap_OtherDeferredCostsNet
Restricted cash	13,900,000	33,300,000
Deferred financing costs	6,900,000	2,600,000
IBNR receivables	6,800,000	6,900,000
Capital lease deposit	6,200,000us-gaap_DepositAssets	6,200,000us-gaap_DepositAssets
Intangible assets	5,100,000	5,200,000
Assets held for sale	1,200,000	1,100,000
Other	24,500,000	63,800,000
Total	282,900,000us-gaap_OtherAssetsNoncurrent	336,700,000us-gaap_OtherAssetsNoncurrent
Capitalized Operating Permits
Other assets:
Waste disposal site operating permits, net	$ 53,200,000	$ 59,500,000

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Net amount of long-term deferred finance costs capitalized at the end of the reporting period.

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The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement.

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Amount classified as other assets attributable to disposal group held for sale or disposed of, expected to be disposed of after one year or the normal operating cycle, if longer.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

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Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Net amount of other deferred costs capitalized at the end of the reporting period. Does not include deferred finance costs or deferred acquisition costs of insurance companies.

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Amount of real estate investment property, net of accumulated depreciation, which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Estimated amount after valuation allowance of reinsurance recoverables, due from reinsurers for incurred claims not yet reported, and claims settlement expenses.

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Cash and equivalents whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements.

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