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Commitments and contingencies - Lead Pigment Litigation-NL and Environmental Matters and Litigation - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Jul. 24, 2019
USD ($)
installment
defendant
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2023
USD ($)
case
site
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Jul. 25, 2019
USD ($)
Commitments And Contingent Liabilities [Line Items]                      
Litigation settlement           $ 11,800,000 $ 11,800,000        
Litigation settlement net present value           16,100,000 27,400,000        
Current insurance recovery receivable           0 0        
Accrual for reasonably estimable environmental remediation and related matters           96,900,000 97,300,000 $ 97,600,000 $ 98,600,000    
Other Environmental Cleanup Matters                      
Commitments And Contingent Liabilities [Line Items]                      
Accrual for reasonably estimable environmental remediation and related matters           6,000,000          
NL | Environmental Remediation Sites NL Named As PRP Or Defendant                      
Commitments And Contingent Liabilities [Line Items]                      
Accrual for reasonably estimable environmental remediation and related matters           $ 91,000,000          
Number of sites associated with remediation and related costs | site           33          
Number of sites for which NL not currently able to reasonably estimate range of costs           5          
NL | 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           $ 118,000,000          
Lead Pigment Litigation | NL                      
Commitments And Contingent Liabilities [Line Items]                      
Number of cases settled and dismissed and found not liable | case           100          
Period by which loss contingency claims settled and dismissed           30 years          
C A Lead Paint Litigation | NL                      
Commitments And Contingent Liabilities [Line Items]                      
Description of defendants           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 NL) 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 NL and its co-defendants in respect to the case.          
Number of Defendant | defendant 3                    
Settlement amount $ 305,000,000                    
Litigation settlement 101,700,000                    
Litigation settlement charge upon approval of settlement terms 25,000,000.0                    
Remaining litigation settlement charge $ 76,700,000         $ 101,700,000          
Number of annual installment payments | installment 6                    
Litigation payment   $ 12,000,000.0 $ 12,000,000.0 $ 12,000,000.0 $ 12,000,000.0            
Remaining litigation settlement charge due in first installment $ 12,000,000.0                    
Remaining litigation settlement charge due in second installment 12,000,000                    
Remaining litigation settlement charge due in third installment 12,000,000                    
Remaining litigation settlement charge due in fourth installment 12,000,000                    
Remaining litigation settlement charge due in fifth installment 12,000,000                    
Remaining litigation settlement charge due in sixth installment $ 16,700,000                    
Litigation settlement net present value           $ 96,300,000          
Discounted rate for estimated present value of remaining litigation amount           1.90%          
Litigation settlement accrual payments                   $ 25,000,000.0  
Accretion expense           $ 700,000 $ 900,000 $ 1,100,000      
C A Lead Paint Litigation | NL | Other Assets                      
Commitments And Contingent Liabilities [Line Items]                      
Escrow deposit                     $ 9,000,000.0