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Credit Agreements and Short-term Financing - Additional Information (Detail) - USD ($)
 12 Months Ended
Aug. 09, 2023
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Line Of Credit Facility [Line Items]        
Borrowings   $ 220,000,000 $ 0  
Interest expense on short-term debt   700,000 1,400,000 $ 700,000
Outstanding overdrafts payable   0    
Collateralized Agreements [Member]        
Line Of Credit Facility [Line Items]        
Interest expense on borrowings   0 100,000 100,000
Maximum available borrowings to subsidiary under agreement   $ 500,000,000    
Interest rate, stated percentage   1.00%    
Outstanding borrowings under agreement   $ 0    
Unused borrowing capacity, amount under agreement   $ 500,000,000    
Collateralized Agreements [Member] | Minimum [Member]        
Line Of Credit Facility [Line Items]        
Interest rate, stated percentage   0.25%    
Collateralized Borrowing Agreement [Member]        
Line Of Credit Facility [Line Items]        
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   us-gaap:BaseRateMember    
2021 Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Interest expense on borrowings       100,000
2023 Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Sub-limit for swingline loans $ 380,000,000      
Interest expense on borrowings   $ 800,000 $ 200,000 $ 100,000
Interest rate, stated percentage   5.10%    
Line of Credit Facility, Description   On August 9, 2023, the Company entered into the 2023 Credit Agreement provided by a syndicate of lenders and JPMorgan Chase Bank, N.A., as administrative agent    
Revolving Credit Facility [Member] | 2023 Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Revolving loans and letters of credit $ 750,000,000      
Expiration period of credit agreement Aug. 09, 2026      
Period of credit agreement   364 days    
Letter of credit outstanding   $ 100,000    
Amount available under credit agreement   529,900,000    
Additional borrowings under credit agreement   375,000,000    
Borrowings   $ 220,000,000    
Standby Letters of Credit [Member] | 2023 Credit Agreement [Member]        
Line Of Credit Facility [Line Items]        
Sub-limit for letter of credit $ 5,000,000