Retirement Plans and Postretirement Benefit Plans - Summary of Reconciliation of Postretirement Benefit Plans Investments (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Level 3 Asset Value, Beginning of Period	$ 28.1
Claims paid	(4.8)
Net unrealized losses related to instruments held at the reporting date	(1.8)
Investment fees	(0.1)
Realized losses	(0.6)
Interest income	0.7
Dividend income	0.1
Level 3 Asset Value, End of Period	$ 21.6