Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension And Other Postretirement Benefits [Abstract]
Required term of service to be eligible for plan match	one year of service and 1,000 hours of service
Employer contributions	$ 12.0	$ 11.6
Expected employer contributions remainder of year	$ 30.0