Amounts Related to Cumulative Basis Adjustments for Fair Value Hedges (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying amount of the hedged liabilities	$ 128.1	$ 319.8
Hedged Liability, Statement of Financial Position [Extensible Enumeration]	Notes Payable	Notes Payable
Cumulative basis adjustment included in the carrying amount	$ 7.1	$ 27.7