Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
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
Expected employer contributions remainder of year	$ 20,000,000.0		$ 20,000,000.0
Employer contributions	10,000,000.0	$ 10,000,000.0	23,900,000	$ 22,000,000.0
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 0		$ 0		$ 0