Benefit Plans (Weighted-Average Assumptions to Determine Benefit Obligations) (Details)	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	0.86%	0.56%
Rate of compensation increase (as a percent)	1.77%	1.79%
Interest crediting rate (as a percent)	3.15%	3.20%
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate (as a percent)	3.08%	2.84%
Heath care cost trend rate assumed for next year (as a percent)	6.27%	6.21%
Ultimate trend rate (as a percent)	4.80%	4.73%