Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Required term of service to be eligible for plan match	one year of service and 1,000 hours of service
Expected employer contributions remainder of year	$ 30,000,000.0
Employer contributions	11,100,000	$ 13,900,000
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 0		$ 0