Pension And Other Postretirement Benefits (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Non-cash pension settlement charge		$ 15,900,000		$ 15,900,000
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
Non-cash pension settlement charge		15,900,000		15,900,000
Expected employer contributions remainder of year	$ 0		$ 0
Employer contributions	80,000,000.0	$ 22,800,000	103,900,000	$ 44,800,000
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Plan assets	$ 0		$ 0		$ 0