Derivatives and Hedging Activities - Impact of Effective Portion of Interest Rate Swap Contracts, Designated as Cash Flow Hedging Instruments (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Other Comprehensive Income (Loss), Net of Tax [Member] | Interest Rate Swap Contracts [Member] | Derivative Instruments Designated as Hedging Instrument [Member] | Cash Flow Hedges of Interest Rate Risk [Member] | |||
| Derivative Instruments, Gain (Loss) [Line Items] | |||
| Other comprehensive income (loss), net of tax | $ (8.2) | $ 16.0 | $ 14.4 |