Derivative Instruments and Hedging Activities - Schedule of Amounts Recorded On Balance Sheet Related To Cumulative Basis Adjustments For Fair Value Hedges (Detail) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Carrying Amount of Hedged Liabilities [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt	$ 875.2	$ 837.6
Cumulative Amount of Fair Value Hedging Adjustment Included in Carrying Amount of Hedged Liabilities [Member] \| Long Term Debt Noncurrent [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Long-term debt	$ (121.1)	$ (158.6)

Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Name:	us-gaap_LongTermDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant