Employee Benefit Plans and Other Postretirement Benefits - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Retirement age threshold		55 years
Postretirement benefits eligibility, years of service requirement		10 years
Company contributions		$ 21.7	$ 21.9	$ 20.1
Pension and SERPA Benefits
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		6.70%	7.10%	7.25%
Accumulated benefit obligation		$ 2,300.0	$ 2,120.0
Pension Plan Assets
Defined Benefit Plan Disclosure [Line Items]
Investment in company common stock (in shares)		1,273,592	1,273,592
Pension Plan Assets | Defined Benefit Plan, Equity Securities, Common Stock
Defined Benefit Plan Disclosure [Line Items]
Investment in company common stock - value		$ 46.7	$ 47.4
Pension Plan Assets | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.20%
Pension Plan Assets | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation		53.00%
Pension Plan Assets | Fixed Income Securities and Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation		47.00%
Postretirement Health Coverage
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets		7.00%	7.25%	7.25%
Postretirement Health Coverage | Scenario, Forecast
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.70%
Postretirement Health Coverage | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation		69.00%
Postretirement Health Coverage | Fixed Income Securities and Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Target plan asset allocation		31.00%