Benefit Plans - Actuarial Calculation Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost, rate of compensation increase	4.00%	4.00%	4.00%
Benefit obligations, rate of compensation increase	4.00%	4.00%
Minimum | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost, discount rate	2.29%	3.05%	3.04%
Net periodic benefit cost, expected return on plan assets	6.50%	6.50%	7.00%
Benefit obligations, discount rate	2.65%	2.29%
Minimum | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost, discount rate	2.18%	2.59%	2.52%
Net periodic benefit cost, expected return on plan assets	4.20%	4.20%	4.00%
Benefit obligations, discount rate	2.61%	2.18%
Maximum | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost, discount rate	2.48%	3.23%	4.16%
Net periodic benefit cost, expected return on plan assets	6.75%	6.75%	7.25%
Benefit obligations, discount rate	2.82%	2.48%
Maximum | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit cost, discount rate	2.41%	3.18%	4.09%
Net periodic benefit cost, expected return on plan assets	6.50%	6.50%	7.00%
Benefit obligations, discount rate	2.76%	2.41%