Benefit Plans and Other Postretirement Benefits Benefit Plans and Other Postretirement Benefits, Fair Value Hierarchy (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
annual interest crediting rates	$ 1.96	$ 1.78	$ 2.74
asset transferred	0
Supplemental Executive Retirement Plan (SERP) and Nonqualified Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total benefit obligation	$ 3,000,000	$ 4,000,000