Benefit Plans (Assumptions used to Determine Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension [Member]
Discount rates:
Service cost		3.20%	3.10%	3.70%
Interest cost		2.50%	2.00%	3.00%
Expected rate of return on plan assets		6.10%	6.60%	6.60%
Rate of compensation increase - long-term		4.00%	4.00%	4.00%
Pension [Member] | Forecast [Member]
Discount rates:
Expected rate of return on plan assets	6.10%
Postretirement Benefit Plan [Member]
Discount rates:
Service cost		3.20%	3.10%	3.60%
Interest cost		2.50%	2.00%	3.00%
Expected rate of return on plan assets		7.70%	7.70%	7.70%
Health care cost trend rate		6.50%	6.50%	6.50%
Postretirement Benefit Plan [Member] | Forecast [Member]
Discount rates:
Expected rate of return on plan assets	7.40%