Employee Benefits - Net Periodic Benefit Costs Actuarial Assumptions (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Ultimate health care cost trend rate	4.50%
Combined Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	3.25%	3.25%	3.25%
Expected long-term rate of return on plan assets	5.50%	6.50%	6.50%
Combined Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.70%	2.79%	3.94%
Combined Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.88%	3.55%	4.44%
Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets	4.00%	4.00%	4.00%
Ultimate health care cost trend rate	4.50%	4.50%	4.50%
Post-Retirement Benefit Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.58%	1.69%	3.84%
Initial health care cost trend rate	6.25%	5.00%	5.00%
Post-Retirement Benefit Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.60%	3.35%	4.38%
Initial health care cost trend rate	5.00%	6.50%	6.50%