Pension Benefits and Postretirement Benefits Other Than Pensions - Narrative (Details)	3 Months Ended
	Mar. 31, 2022 employees
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Number of participants and beneficiaries	3,145
Percentage of Compensation, Defined Benefit Plan Employee Contribution	3.00%
Postretirement Benefits Other than Pensions
Defined Benefit Plan Disclosure [Line Items]
Number of retired employees covered	400
Number of active employees covered	500