Pension and Other Postretirement Benefits - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	Jul. 31, 2023	Sep. 30, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, liquidated assets	$ 50.0
Employer contributions		$ 3.4
Expected future employer contributions, remainder of fiscal year		5.2
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Employer contributions		0.1
Expected future employer contributions, remainder of fiscal year		$ 0.2