Postretirement Benefits Other Than Pensions - Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) employees	Dec. 31, 2022 USD ($)	Dec. 31, 2018 USD ($)
Other Postretirement Benefit Plan, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Number of retired employees covered | employees	400
Number of active employees covered | employees	500
Pre-tax reduction to its accumulated postretirement benefit obligation			$ 11.0
Amounts that will be amortized from AOCI in next fiscal Year		$ 2.8
Estimated future employer contributions in next fiscal year	$ 0.9
Medical Benefits
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	6.70%	6.00%
Health care cost trend rate assumed for future years	4.70%	4.80%
Prescription Drug Benefits
Defined Benefit Plan Disclosure [Line Items]
Health care cost trend rate assumed for next fiscal year	8.00%	6.70%
Health care cost trend rate assumed for future years	4.80%	4.80%