Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Expected employer contributions remainder of year	$ 30,000,000.0
Pension Benefits
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
Employer contributions	$ 13,900,000	$ 12,000,000.0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 0		$ 0