Commitments and Contingencies - Additional Information (Detail) $ in Thousands		3 Months Ended		6 Months Ended
	Jul. 24, 2019 USD ($) Defendant Installment	Jun. 30, 2020 USD ($) site	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) Cases site	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Commitments and Contingent Liabilities [Line Items]
Additional litigation settlement expense			$ 19,571		$ 19,571
Accrual for reasonably estimable environmental remediation and related matters		$ 93,833		$ 93,833		$ 94,508
Insurance recoveries		86	4,714	108	$ 4,997
Environmental Remediation Sites NL Named As PRP Or Defendant
Commitments and Contingent Liabilities [Line Items]
Accrual for reasonably estimable environmental remediation and related matters		$ 94,000		$ 94,000
Number of sites associated with remediation and related costs | site		32		32
Number of sites currently not able to reasonably estimate a range of costs | site		5		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		$ 115,000		$ 115,000
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				30 years
Description of defendants				on July 24, 2019, an order approving a global settlement agreement entered into among all of the plaintiffs and the three defendants remaining in the case (the Sherwin Williams Company, ConAgra Grocery Products and us) was entered by the court and the case was dismissed with prejudice. The global settlement agreement provides that an aggregate $305 million will be paid collectively by the three co-defendants in full satisfaction of all claims resulting in a dismissal of the case with prejudice and the resolution of (i) all pending and future claims by the plaintiffs in the case, and (ii) all potential claims for contribution or indemnity between us and our co-defendants in respect to the case.
Number of defendants | Defendant	3
Litigation settlement amount	$ 305,000
NL's portion of global settlement amount, gross value	101,700
Litigation initial payment made 60 days after litigation settlement	25,000
Remaining litigation settlement charge	$ 76,700
Number of annual installments | Installment	6
Remaining litigation settlement payment due in first year	$ 12,000
Remaining litigation settlement payment due in second year	12,000
Remaining litigation settlement payment due in third year	12,000
Remaining litigation settlement payment due in fourth year	12,000
Remaining litigation settlement payment due in fifth year	12,000
Remaining litigation settlement payment due in sixth year	$ 16,700
Discounted rate for estimated present value of remaining litigation amount		1.90%		1.90%
Additional litigation settlement expense			$ 19,300