Indebtedness - Bank Debt - Additional Information (Detail) - Bank Credit Facility $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2025 USD ($) Commercialbank	Jun. 30, 2025 USD ($) Commercialbank	Mar. 31, 2025 USD ($)
Debt Instrument [Line Items]
Bank credit facility, maximum amount	$ 4,000.0	$ 4,000.0
Bank credit facility, borrowing base	3,000.0	3,000.0	$ 3,000.0
Bank commitments	$ 1,500.0	$ 1,500.0	$ 1,500.0
Number of commercial banks included in current bank group | Commercialbank	17	17
Maturity date of loan		Apr. 14, 2027
Bank debt outstanding balance	$ 125.0	$ 125.0
Undrawn letters of credit	164.1	164.1
Borrowing capacity available under the commitment amount	$ 1,200.0	$ 1,200.0
Annual rate of commitment fee paid on the undrawn balance		0.375%
Weighted average interest rate on the bank credit facility	6.40%	6.40%
Alternate Base Rate
Debt Instrument [Line Items]
Interest rate margin		0.75%
SOFR
Debt Instrument [Line Items]
Interest rate margin		1.75%
Minimum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance		0.375%
Minimum | Alternate Base Rate
Debt Instrument [Line Items]
Interest rate on notes	0.75%	0.75%
Minimum | SOFR
Debt Instrument [Line Items]
Interest rate on notes	1.75%	1.75%
Maximum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance		0.50%
Maximum | Alternate Base Rate
Debt Instrument [Line Items]
Interest rate on notes	1.75%	1.75%
Maximum | SOFR
Debt Instrument [Line Items]
Interest rate on notes	2.75%	2.75%