Credit Agreements and Short-term Financing - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 09, 2023	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Line Of Credit Facility [Line Items]
Interest expense on short-term debt		$ 200,000	$ 300,000	$ 500,000	$ 1,100,000
Outstanding overdrafts payable		0		0
Collateralized Agreements [Member]
Line Of Credit Facility [Line Items]
Interest expense on borrowings		0	100,000	0	100,000
Maximum available borrowings to subsidiary under agreement		$ 500,000,000		$ 500,000,000
Interest rate, stated percentage		1.00%		1.00%
Outstanding borrowings under agreement		$ 0		$ 0
Unused borrowing capacity, amount under agreement		$ 500,000,000		$ 500,000,000
Collateralized Borrowing Agreement [Member]
Line Of Credit Facility [Line Items]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]				us-gaap:BaseRateMember
Minimum [Member] | Collateralized Agreements [Member]
Line Of Credit Facility [Line Items]
Interest rate, stated percentage		0.25%		0.25%
2021 Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Interest expense on borrowings		$ 0	$ 0	$ 0	$ 200,000
Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Period of credit agreement	3 years
Sub-limit for swingline loans	$ 380,000,000
Line of Credit Facility, Description				On August 9, 2023, the Company entered into a three-year revolving credit facility (the “Credit Agreement”) provided by a syndicate of lenders and JPMorgan Chase Bank, N.A., as administrative agent
Revolving Credit Facility [Member] | 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		$ 100,000
Amount available under credit agreement		749,900,000		749,900,000
Additional borrowings under credit agreement		$ 375,000,000		$ 375,000,000
Standby Letters of Credit [Member] | Credit Agreement [Member]
Line Of Credit Facility [Line Items]
Sub-limit for letter of credit	$ 5,000,000