Employee Benefit Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure
Retirement age threshold		55 years
Postretirement benefits eligibility, years of service requirement		10 years
Company contributions		$ 30.5	$ 30.9	$ 19.4
Pension and SERPA Benefits
Defined Benefit Plan Disclosure
Expected return on plan assets		6.80%	5.60%	6.20%
Accumulated benefit obligation		$ 1,570.0	$ 1,550.0
Pension Benefits
Defined Benefit Plan Disclosure
Investment in company common stock (in shares)		1,273,592	1,273,592
Pension Benefits | Equity Holdings
Defined Benefit Plan Disclosure
Target plan asset allocation		30.00%
Pension Benefits | Fixed Income Securities and Cash and Cash Equivalents
Defined Benefit Plan Disclosure
Target plan asset allocation		70.00%
Pension Benefits | Defined Benefit Plan, Equity Securities, Common Stock
Defined Benefit Plan Disclosure
Investment in company common stock - value		$ 46.9	$ 53.0
Pension Benefits | Scenario, Forecast
Defined Benefit Plan Disclosure
Expected return on plan assets	6.20%
Postretirement Healthcare Benefits
Defined Benefit Plan Disclosure
Expected return on plan assets		7.48%	6.77%	6.69%
Postretirement Healthcare Benefits | Equity Holdings
Defined Benefit Plan Disclosure
Target plan asset allocation		68.00%
Postretirement Healthcare Benefits | Fixed Income Securities and Cash and Cash Equivalents
Defined Benefit Plan Disclosure
Target plan asset allocation		32.00%
Postretirement Healthcare Benefits | Scenario, Forecast
Defined Benefit Plan Disclosure
Expected return on plan assets	7.50%