Pension and Postretirement Benefits - Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Net actuarial gain (loss), tax expense (benefit)	$ 4.8	$ (1.1)	$ (15.6)
Prior service credit (cost), tax benefit (expense)	0.2	(0.2)	0.1
Amortization of actuarial (loss) gain, tax expense (benefit) (less than)	(2.2)	(0.7)	0.1
Amortization of prior service (cost) credit, tax (expense) benefit (less than)	(0.6)	(0.1)	(0.1)
Pension plans
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Actuarial (loss) gain arising during the year, before tax benefit (expense) of $(4.8), $1.1 and $15.6 for the years ended December 31, 2024, 2023and 2022, respectively.	3.9	(3.6)	(61.9)
Prior service credit (cost) arising during the year, before tax benefit (expense) of $0.2, $(0.2) and less than $0.1 for the years ended December 31, 2024, 2023 and 2022, respectively.	(0.1)	0.5	0.2
Amortization of actuarial (loss) gain, before tax benefit (expense) of $(2.2), $(0.7) and less than $0.1 for the years ended December 31, 2024, 2023 and 2022, respectively.	1.7	2.4	(0.1)
Amortization of prior service (cost) credit, before tax benefit (expense) of $(0.6), $(0.1) and $(0.1) for the years ended December 31, 2024, 2023 and 2022, respectively.	0.1	0.0	0.0
Postretirement benefit obligations
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss)
Actuarial (loss) gain arising during the year, before tax benefit (expense) of $(4.8), $1.1 and $15.6 for the years ended December 31, 2024, 2023and 2022, respectively.	(0.1)	0.0	0.2
Prior service credit (cost) arising during the year, before tax benefit (expense) of $0.2, $(0.2) and less than $0.1 for the years ended December 31, 2024, 2023 and 2022, respectively.	(0.1)	0.0	(0.1)
Amortization of actuarial (loss) gain, before tax benefit (expense) of $(2.2), $(0.7) and less than $0.1 for the years ended December 31, 2024, 2023 and 2022, respectively.	0.0	0.0	0.0
Amortization of prior service (cost) credit, before tax benefit (expense) of $(0.6), $(0.1) and $(0.1) for the years ended December 31, 2024, 2023 and 2022, respectively.	$ 0.4	$ 0.4	$ 0.4