Benefit Plans (Assumptions used to Determine Net Periodic Benefit Cost) (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension [Member]
Discount rates:
Service cost	5.70%	3.20%	3.10%
Interest cost	5.50%	2.50%	2.00%
Expected rate of return on plan assets	6.10%	6.10%	6.60%
Rate of compensation increase - long-term	4.00%	4.00%	4.00%
Postretirement Benefit Plan [Member]
Discount rates:
Service cost	5.70%	3.20%	3.10%
Interest cost	5.50%	2.50%	2.00%
Expected rate of return on plan assets	7.40%	7.70%	7.70%
Health care cost trend rate	6.50%	6.50%	6.50%