Benefit Plans (Net Pension and Postretirement Cost Weighted-Average Assumptions) (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - service cost (as a percent)	0.72%	1.25%	2.14%
Discount rate - interest cost (as a percent)	0.44%	0.67%	1.35%
Expected rate of return on plan assets (as a percent)	4.43%	4.59%	4.70%
Rate of compensation increase (as a percent)	1.79%	1.82%	1.86%
Interest crediting rate (as a percent)	3.20%	3.20%	3.40%
Postretirement
Defined Benefit Plan Disclosure [Line Items]
Discount rate - service cost (as a percent)	2.84%	3.28%	3.97%
Discount rate - interest cost (as a percent)	2.84%	3.28%	3.97%
Health care cost trend rate (as a percent)	6.21%	6.21%	6.17%