Commitments and Contingencies - Additional Information (Detail)	1 Months Ended	3 Months Ended
	Jan. 31, 2014 USD ($)	Mar. 31, 2018 USD ($) Cases site Plaintiff	Dec. 31, 2017 USD ($)
Commitments and Contingent Liabilities [Line Items]
Accrual for reasonably estimable environmental remediation and related matters		$ 115,758,000	$ 111,909,000
Environmental Remediation Sites NL Named As PRP Or Defendant
Commitments and Contingent Liabilities [Line Items]
Accrual for reasonably estimable environmental remediation and related matters		$ 116,000,000
Number of sites associated with remediation and related costs | site		38
Number of sites currently not able to reasonably estimate a range of costs | site		5
Maximum | Environmental Remediation Sites NL Named As PRP Or Defendant
Commitments and Contingent Liabilities [Line Items]
Upper end range, estimate costs for remediation and related matters		$ 146,000,000
Environmental Remediation Litigation
Commitments and Contingent Liabilities [Line Items]
Recoveries receivable		$ 0	$ 0
Lead Pigment Litigation
Commitments and Contingent Liabilities [Line Items]
Number of cases settled and dismissed and found not liable | Cases		100
Period by which loss contingency claims settled and dismissed		20 years
Description of defendants		We and the other two defendants are jointly and severally liable for the abatement, and we do not believe any individual defendant would be 100% responsible for the cost of any abatement.
Percentage of defendants responsible for cost of abatement		100.00%
California Lead Paint Litigation
Commitments and Contingent Liabilities [Line Items]
Amount awarded to the plaintiff	$ 1,150,000,000
Minimum required period of abatement funds unspent to return to defendants	4 years
Percentage of assumed homeowners participation		100.00%
Percentage of actual likely homeowners participation rates		100.00%
Product Liability And Occupational Exposure Litigation Claims
Commitments and Contingent Liabilities [Line Items]
Number of cases pending | Cases		106
Product Liability And Occupational Exposure Litigation Claims | Administratively Dismissed Claims
Commitments and Contingent Liabilities [Line Items]
Number of plaintiffs involved | Plaintiff		8,676
Product Liability And Occupational Exposure Litigation Claims | Pending Claims
Commitments and Contingent Liabilities [Line Items]
Number of plaintiffs involved | Plaintiff		579