Employee Benefit Plans - Summary of Pension Plan Assets (Detail) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
Investments in equity securities
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets		$ 15.1
Investments in equity securities | Us Large Cap Equity Securities
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[1]	10.6	$ 15.4
Investments in equity securities | Us Mid Cap Equity Securities
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[1]	3.2	4.3
Investments in equity securities | United States Equity Small Cap
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[1]	0.0	2.5
Investments in equity securities | International All Cap Equity
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[2]	1.3	2.5
Debt securities
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets		32.8	24.2
Debt securities | Fixed Income
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[3]	32.8	24.2
Other
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets		1.2	0.6
Other | Guaranteed deposit
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[4]	1.2	$ 0.6
Fair Value Measured at Net Asset Value Per Share
Debt and Equity Securities, FV-NI [Line Items]
Total Pension Plan Assets	[5]	$ 49.1

[1] Includes funds that invest primarily in United States common stocks.

[2] Includes funds that invest primarily in foreign equities and emerging markets equities.

[3] Includes funds that invest in fixed income securities.

[4] ) Includes investment in a group annuity product issued by an insurance company.

[5] (5) All investments in the FPU Pension Plan are classified as Level 1 within the Fair Value hierarchy exclusive of the Guaranteed Deposit Account which is classified as Level 3.