Retirement Plans and Postretirement Benefit Plans - Summary of Reconciliation of Postretirement Benefit Plans Investments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 Asset Value, Beginning of Period	$ 21.6
Claims paid	(4.5)
Realized losses	(0.9)
Investment fees	(0.1)
Interest income	0.7
Level 3 Asset Value, End of Period	$ 16.8